Add option to play highlight sounds even if Chatterino is focused.

This is off by default

src/settingsmanager.hpp

@@ -50,6 +50,7 @@ public:
     Setting<QString> pathHighlightSound;
     Setting<QMap<QString, QPair<bool, bool>>> highlightProperties;
     Setting<QString> highlightUserBlacklist;
+    pajlada::Settings::Setting<bool> highlightAlwaysPlaySound;
     Setting<bool> enableTwitchEmotes;
     Setting<bool> enableBttvEmotes;
     Setting<bool> enableFfzEmotes;