stylesheet issue pressed down button

[hannesdelbeke]

it's hard to tell the difference between a pressed down button, and a pressed up button

other stylesheet	unreal style

[hannesdelbeke]

unreal uses this blue for the buttons

they have light grey for hover over

we can also use the disabled enabled background colors from unreal

[hannesdelbeke]

overal unreal rarely uses these toggle buttons, and isntead prefers to use checkboxes or dropdowns to enable disable other UI elements