MinimalDesktopTheme: added focus indicator skin
ToggleSwitch: animates selection change when triggered by keyboard
ToggleSwitch: added setSelectionWithAnimation() method (closes #485)
Button: returns to up state when pressing tab to change focus
fixes for overrides of get isFocusEnabled to include isEnabled
ScrollText: may receive focus to allow arrow keys for scrolling
MetalWorksDesktopTheme: added focus indicator skin
PickerList: also closes when enter key is pressed
MinimalDesktopTheme: some more focus indicator skinning
TileList: modernized the code a bit