StageTextTextEditor: improved property descriptions in documentation (references #869)
TextFieldTextEditor: improved property descriptions in documentation (references #869)
TextFieldTextRenderer: improved property descriptions in documentation (references #869)
ScrollText: improved property descriptions in documentation (references #869)
Text editors: further docs improvements (closes #869)
ProgressBar: vertical fill starts from bottom and fills up
Components Explorer: progress bar screen shows both horizontal and vertical progress bars
Themes: better support for vertical progress bars