NumericStepper: updates selection when incrementing and decrementing since the text may have a different length (closes #734)
NumericStepper: rounding value to step accounts forthe minimum value (closes #892)
NumericStepper: better handling of selection after keyboard events (may not work for all text editors)
TextFieldTextEditor: skips snapshot if width or height of snapshot is <= 0
MinimalDesktopTheme: added missing styles for NumericStepper TextInput
TextInput: clears focus on removal if there's no focus manager so that FOCUS_OUT event is dispatched
TextBlockTextRenderer, TextFieldTextRenderer: content isn't disposed on removal because components can be initialized/validated when they're not on stage. requires disposal now, like most starling display objects (references #905)
StageTextTextEditor, TextFieldTextEditor: content isn't disposed on removal because components can be initialized/validated when they're not on stage. requires disposal now, like most starling display objects (closes #905)
StageTextTextEditor, TextFieldTextEditor: no longer dispatches duplicate FOCUS_OUT event
TextArea: added clearFocus() function to manually clear focus, automatically clears focus on removal like TextInput
TextArea: fix issue where background was missing sometimes
TextArea: tweaks to previous fix for background skin
Themes: fixes for missing sub-component properties
Themes: renamed embedded assets to avoid conflicts when multiple themes are added as dependencies of a project and the file names would clash