Added some functionality to the accountPopup (#117)

* Added some buttons.

* Added some more functionality.

* Finished adding button functionality.

* Implemented @fourtf's suggestions.

src/settingsmanager.hpp

@@ -49,6 +49,7 @@ public:
     Setting<bool> customHighlightSound;
     Setting<QString> pathHighlightSound;
     Setting<QMap<QString, QPair<bool, bool>>> highlightProperties;
+    Setting<QString> highlightUserBlacklist;
     Setting<bool> enableTwitchEmotes;
     Setting<bool> enableBttvEmotes;
     Setting<bool> enableFfzEmotes;