allow unselect with a mouse click
allow mouse unselect with a simple click
apply disable on Ui.ContentEditable
remove the text holder when setValue is used
add setRelativePosition to change the alignment of an item around the position
allow to change the orientation [horizontal|vertical] of the Ui.SegmentBar
set the input "disabled" state for Ui.Entry when disable.
correct a bug, remove the text holder when setValue is used
use the textarea "disabled" state whe Ui.TextArea is disabled
allow the setText(null)
vertical align the checkbox text