diff --git a/cockatrice/src/client/tabs/tab.cpp b/cockatrice/src/client/tabs/tab.cpp
index 80f0ffc9a..84fdf2924 100644
--- a/cockatrice/src/client/tabs/tab.cpp
+++ b/cockatrice/src/client/tabs/tab.cpp
@@ -1,13 +1,14 @@
 #include "tab.h"
 
 #include "../ui/widgets/cards/card_info_display_widget.h"
+#include "./tab_supervisor.h"
 
 #include <QApplication>
 #include <QDebug>
 #include <QScreen>
 
-Tab::Tab(TabSupervisor *_tabSupervisor, QWidget *parent)
-    : QMainWindow(parent), tabSupervisor(_tabSupervisor), contentsChanged(false), infoPopup(0)
+Tab::Tab(TabSupervisor *_tabSupervisor)
+    : QMainWindow(_tabSupervisor), tabSupervisor(_tabSupervisor), contentsChanged(false), infoPopup(0)
 {
     setAttribute(Qt::WA_DeleteOnClose);
 }
diff --git a/cockatrice/src/client/tabs/tab.h b/cockatrice/src/client/tabs/tab.h
index b046d5c7a..619bf47c9 100644
--- a/cockatrice/src/client/tabs/tab.h
+++ b/cockatrice/src/client/tabs/tab.h
@@ -31,7 +31,7 @@ private:
     QList<QMenu *> tabMenus;
 
 public:
-    explicit Tab(TabSupervisor *_tabSupervisor, QWidget *parent = nullptr);
+    explicit Tab(TabSupervisor *_tabSupervisor);
     const QList<QMenu *> &getTabMenus() const
     {
         return tabMenus;
diff --git a/cockatrice/src/client/tabs/tab_account.cpp b/cockatrice/src/client/tabs/tab_account.cpp
index efe5e70a3..fed4ab7f0 100644
--- a/cockatrice/src/client/tabs/tab_account.cpp
+++ b/cockatrice/src/client/tabs/tab_account.cpp
@@ -18,11 +18,8 @@
 #include <QPushButton>
 #include <QVBoxLayout>
 
-TabUserLists::TabUserLists(TabSupervisor *_tabSupervisor,
-                           AbstractClient *_client,
-                           const ServerInfo_User &userInfo,
-                           QWidget *parent)
-    : Tab(_tabSupervisor, parent), client(_client)
+TabUserLists::TabUserLists(TabSupervisor *_tabSupervisor, AbstractClient *_client, const ServerInfo_User &userInfo)
+    : Tab(_tabSupervisor), client(_client)
 {
     allUsersList = new UserList(_tabSupervisor, client, UserList::AllUsersList);
     buddyList = new UserList(_tabSupervisor, client, UserList::BuddyList);
diff --git a/cockatrice/src/client/tabs/tab_account.h b/cockatrice/src/client/tabs/tab_account.h
index 94e688ee1..b0c475148 100644
--- a/cockatrice/src/client/tabs/tab_account.h
+++ b/cockatrice/src/client/tabs/tab_account.h
@@ -46,10 +46,7 @@ private:
     void addToList(const std::string &listName, const QString &userName);
 
 public:
-    TabUserLists(TabSupervisor *_tabSupervisor,
-                 AbstractClient *_client,
-                 const ServerInfo_User &userInfo,
-                 QWidget *parent = nullptr);
+    TabUserLists(TabSupervisor *_tabSupervisor, AbstractClient *_client, const ServerInfo_User &userInfo);
     void retranslateUi() override;
     QString getTabText() const override
     {
diff --git a/cockatrice/src/client/tabs/tab_admin.cpp b/cockatrice/src/client/tabs/tab_admin.cpp
index 6140d4675..26c0fa61b 100644
--- a/cockatrice/src/client/tabs/tab_admin.cpp
+++ b/cockatrice/src/client/tabs/tab_admin.cpp
@@ -54,8 +54,8 @@ int ShutdownDialog::getMinutes() const
     return minutesEdit->value();
 }
 
-TabAdmin::TabAdmin(TabSupervisor *_tabSupervisor, AbstractClient *_client, bool _fullAdmin, QWidget *parent)
-    : Tab(_tabSupervisor, parent), locked(true), client(_client), fullAdmin(_fullAdmin)
+TabAdmin::TabAdmin(TabSupervisor *_tabSupervisor, AbstractClient *_client, bool _fullAdmin)
+    : Tab(_tabSupervisor), locked(true), client(_client), fullAdmin(_fullAdmin)
 {
     updateServerMessageButton = new QPushButton;
     connect(updateServerMessageButton, &QPushButton::clicked, this, &TabAdmin::actUpdateServerMessage);
diff --git a/cockatrice/src/client/tabs/tab_admin.h b/cockatrice/src/client/tabs/tab_admin.h
index f1952a658..f360c01d6 100644
--- a/cockatrice/src/client/tabs/tab_admin.h
+++ b/cockatrice/src/client/tabs/tab_admin.h
@@ -54,7 +54,7 @@ private slots:
     void actLock();
 
 public:
-    TabAdmin(TabSupervisor *_tabSupervisor, AbstractClient *_client, bool _fullAdmin, QWidget *parent = nullptr);
+    TabAdmin(TabSupervisor *_tabSupervisor, AbstractClient *_client, bool _fullAdmin);
     void retranslateUi() override;
     QString getTabText() const override
     {
diff --git a/cockatrice/src/client/tabs/tab_deck_editor.cpp b/cockatrice/src/client/tabs/tab_deck_editor.cpp
index d88c81b02..be597a1ff 100644
--- a/cockatrice/src/client/tabs/tab_deck_editor.cpp
+++ b/cockatrice/src/client/tabs/tab_deck_editor.cpp
@@ -698,8 +698,7 @@ void TabDeckEditor::loadLayout()
     QTimer::singleShot(100, this, SLOT(freeDocksSize()));
 }
 
-TabDeckEditor::TabDeckEditor(TabSupervisor *_tabSupervisor, QWidget *parent)
-    : Tab(_tabSupervisor, parent), modified(false)
+TabDeckEditor::TabDeckEditor(TabSupervisor *_tabSupervisor) : Tab(_tabSupervisor), modified(false)
 {
     setObjectName("TabDeckEditor");
 
diff --git a/cockatrice/src/client/tabs/tab_deck_editor.h b/cockatrice/src/client/tabs/tab_deck_editor.h
index 7a3859413..0a11b3c8c 100644
--- a/cockatrice/src/client/tabs/tab_deck_editor.h
+++ b/cockatrice/src/client/tabs/tab_deck_editor.h
@@ -163,7 +163,7 @@ private:
     QWidget *centralWidget;
 
 public:
-    explicit TabDeckEditor(TabSupervisor *_tabSupervisor, QWidget *parent = nullptr);
+    explicit TabDeckEditor(TabSupervisor *_tabSupervisor);
     void retranslateUi() override;
     QString getTabText() const override;
     void setDeck(DeckLoader *_deckLoader);
diff --git a/cockatrice/src/client/tabs/tab_logs.cpp b/cockatrice/src/client/tabs/tab_logs.cpp
index b9d06dee2..e43be2215 100644
--- a/cockatrice/src/client/tabs/tab_logs.cpp
+++ b/cockatrice/src/client/tabs/tab_logs.cpp
@@ -21,8 +21,7 @@
 #include <QtGui>
 #include <QtWidgets>
 
-TabLog::TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client, QWidget *parent)
-    : Tab(_tabSupervisor, parent), client(_client)
+TabLog::TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client) : Tab(_tabSupervisor), client(_client)
 {
     roomTable = new QTableWidget();
     roomTable->setColumnCount(6);
diff --git a/cockatrice/src/client/tabs/tab_logs.h b/cockatrice/src/client/tabs/tab_logs.h
index 89bebf3e9..5694a24c7 100644
--- a/cockatrice/src/client/tabs/tab_logs.h
+++ b/cockatrice/src/client/tabs/tab_logs.h
@@ -53,7 +53,7 @@ private slots:
     void restartLayout();
 
 public:
-    TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client, QWidget *parent = nullptr);
+    TabLog(TabSupervisor *_tabSupervisor, AbstractClient *_client);
     ~TabLog() override;
     void retranslateUi() override;
     QString getTabText() const override
diff --git a/cockatrice/src/client/tabs/tab_server.cpp b/cockatrice/src/client/tabs/tab_server.cpp
index e0906e8d4..029964d8e 100644
--- a/cockatrice/src/client/tabs/tab_server.cpp
+++ b/cockatrice/src/client/tabs/tab_server.cpp
@@ -138,8 +138,7 @@ void RoomSelector::joinClicked()
     emit joinRoomRequest(id, true);
 }
 
-TabServer::TabServer(TabSupervisor *_tabSupervisor, AbstractClient *_client, QWidget *parent)
-    : Tab(_tabSupervisor, parent), client(_client)
+TabServer::TabServer(TabSupervisor *_tabSupervisor, AbstractClient *_client) : Tab(_tabSupervisor), client(_client)
 {
     roomSelector = new RoomSelector(client);
     serverInfoBox = new QTextBrowser;
diff --git a/cockatrice/src/client/tabs/tab_server.h b/cockatrice/src/client/tabs/tab_server.h
index 1af0e2a35..890a79cea 100644
--- a/cockatrice/src/client/tabs/tab_server.h
+++ b/cockatrice/src/client/tabs/tab_server.h
@@ -55,7 +55,7 @@ private:
     bool shouldEmitUpdate = false;
 
 public:
-    TabServer(TabSupervisor *_tabSupervisor, AbstractClient *_client, QWidget *parent = nullptr);
+    TabServer(TabSupervisor *_tabSupervisor, AbstractClient *_client);
     void retranslateUi() override;
     QString getTabText() const override
     {