SwitchButton (#39161)

SwitchButton (#39161)

* Initial toggle switch styling

* tweak toggle switch textures

* Simplify toggle SVG images a bit

* Better name for switch button

* Update CheckButtons that were already just regular buttons

* Match checkbox/text field outline colour instead of slider outline colour

* Use switch button for APC power

* Update switch button styling; add separate style for power buttons

* Use new switch button in midi channels menu

* Add spacer

* adjust switch button icon proportions, position

* Add disabled toggle switch styles, use improved pressed style setup, make APC breaker state visible to all

* Use Janet Blackquill's icon design; remove StyleClassPowerSwitchButton. Co-authored-by: Janet Blackquill <uhhadd@gmail.com>

* Style switch children directly instead of with propagated styles

* Add attributions file

* Turns out source is a required field

* Move SwitchButton out of engine

* Move styles to sheetlet

* Make workaround for child controls not updating work in content

* Icon layers

* Set up ISwitchButtonConfig

* Fix disabled switch label font color

* Don't redefine base pseudostyles

* Use pseudoclass helpers for better readability

* Use margin instead of padding element

* Remove unused using statements

* Remove extra image file

* Update attributions for changed files