[Game Selector] Add button to join game as judge as well as convenience filters and doxygen (#6325)

* Add button to join game as judge as well as convenience filters.

Took 1 hour 11 minutes

* Change button to filter to games created by buddies, set default filter settings to be very permissive.

Took 45 minutes

* Remove debug.

Took 3 minutes

* Update game_selector.cpp

* Add spacers, rearrange.

Took 20 minutes


Took 20 seconds

* Add explanation tooltip.

Took 39 seconds

* Try layouting.

Took 14 minutes

* Set min size, set spacing for mac os

Took 3 minutes

* Try without the labels.

Took 3 minutes

* Don't use labels.

Took 5 minutes

* Fine-tune.

Took 2 minutes

* AsJudge

Took 4 minutes

* Clear up comment.

Took 37 seconds

* Remove shift hotkey.

Took 4 minutes

* Spectate as judge.

Took 8 minutes

* Add checkBox to create game as judge.

Took 7 minutes

* Fix crash.

Took 12 minutes

* Rename, fix returns.

Took 19 minutes

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

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

@@ -46,7 +46,7 @@ private:
     QSpinBox *maxPlayersEdit, *startingLifeTotalEdit;
     QCheckBox *onlyBuddiesCheckBox, *onlyRegisteredCheckBox;
     QCheckBox *spectatorsAllowedCheckBox, *spectatorsNeedPasswordCheckBox, *spectatorsCanTalkCheckBox,
-        *spectatorsSeeEverythingCheckBox, *createGameAsSpectatorCheckBox;
+        *spectatorsSeeEverythingCheckBox, *createGameAsJudgeCheckBox, *createGameAsSpectatorCheckBox;
     QCheckBox *shareDecklistsOnLoadCheckBox;
     QDialogButtonBox *buttonBox;
     QPushButton *clearButton;