fix: Hack for checkbox on Linux. If shows incorrect checkbox value it only does so until the user clicks it

feat: Remove tray menu since can only left click tray icon on Windows so unable to toggle window show/hide as well

feat: On non-macOS context menu, remove File and Help menu, and replace with About and Quit items at bottom

fix: Fixes cannot getContent of undefined bug when run TASKBAR=false and Close Window then re-open it