tray icon context menu ideas
i would guess that people will be changing presets more often than adjusting settings - if that is the case, i might suggest swapping the primary and secondary click on the tray icon so that a primary click opens the context menu and the secondary opens the GUI
more importantly, there is no indication of what preset is loaded in the context menu (KDE, dark desktop theme) - the bypass has a checkbox and i might suggest adding (if possible) some visual way to similarly determine what preset is loaded, be that a font style change (bold), background color, or radio buttons
it might also be convenient to have an option to display the presets in the context menu as a top-level menu instead of a sub-menu, or, better yet, don't add an option and always display them as a top-level menu until the number of entries reaches 'x', then move them to a sub-menu