When toggle mode is enabled, the button will toggle between the `Pressed` and `Released` state when it's pressed.
Without toggle mode:
ACTION_DOWN -> Pressed
ACTION_UP -> Released
ACTION_DOWN -> Pressed
ACTION_UP -> Released
With toggle mode:
ACTION_DOWN -> Pressed
ACTION_UP -> No event
ACTION_DOWN -> No event
ACTION_UP -> Released
An unusual big commit, unfortunately needed because none of these changes would make sense nor work individual. A quick list of what have been done follows.
* Introduced a control panel to control buttons replacing the FAB bar
* `ConfigurableButton` and `OnScreenConfiguration` interfaces have been introduced to allow for easier proxying of actions when applying the same changes to all buttons
* Button resize logic has been stripped from the buttons in favor of the new sliders
* General cleanup and renaming of various methods to better reflect their functionality
As part of this commit, a `defaultEnabled` property was added to `OnScreenButton` to determine the default visibility of buttons. This is required because L3 and R3 should be hidden by default and only enabled by the user on demand.
Additionally, the buttons' mask values were added to `ButtonId` members, as adding entries in the middle of the class conflicted with the `ordinal` enum property, making it unfit to use for our purposes.
Finally, the `ControllerType` class was extended with an array of optional buttons. Optional buttons represent buttons that are allowed to be displayed on screen, but shouldn't be included in the controller mapping activity.
* Add bold text and antialiasing for osc buttons
* Fix osc dpad and button position (widder than taller)
* Set default OSC color to white background with black text
