[Move refactor] Move dialogs to interface/widgets/ (#6234)

* Move dialogs/ underneath interface/widgets since QDialog inherits from QWidget.

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/interface/widgets/dialogs/dlg_update.h

@@ -0,0 +1,53 @@
+/**
+ * @file dlg_update.h
+ * @ingroup ClientUpdateDialogs
+ * @brief TODO: Document this.
+ */
+
+#ifndef DLG_UPDATE_H
+#define DLG_UPDATE_H
+
+#include "../client/network/update/client/update_downloader.h"
+
+#include <QDialogButtonBox>
+#include <QLoggingCategory>
+#include <QProgressDialog>
+#include <QtNetwork>
+
+inline Q_LOGGING_CATEGORY(DlgUpdateLog, "dlg_update");
+
+class Release;
+
+class DlgUpdate : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit DlgUpdate(QWidget *parent);
+
+private slots:
+    void finishedUpdateCheck(bool needToUpdate, bool isCompatible, Release *release);
+    void gotoDownloadPage();
+    void downloadUpdate(const QString &releaseName);
+    void cancelDownload();
+    void updateCheckError(const QString &errorString);
+    void downloadSuccessful(const QUrl &filepath);
+    void downloadProgressMade(qint64 bytesRead, qint64 totalBytes);
+    void downloadError(const QString &errorString);
+    void closeDialog();
+
+private:
+    QUrl updateUrl;
+    void enableUpdateButton(bool enable);
+    void enableOkButton(bool enable);
+    void addStopDownloadAndRemoveOthers(bool enable);
+    void beginUpdateCheck();
+    void setLabel(const QString &text);
+    QLabel *statusLabel, *descriptionLabel;
+    QProgressBar *progress;
+    QPushButton *manualDownload, *gotoDownload, *ok, *stopDownload;
+    QPushButton *cancel;
+    UpdateDownloader *uDownloader;
+    QDialogButtonBox *buttonBox;
+};
+
+#endif