Support Ellipsis Position Property

Support Ellipsis Position Property

Added new property Ellipsis to TextEditor
Added new property Ellipsis_Position to TextLabel, TextField and TextEditor

Example:
textLabel.SetProperty(DevelTextLabel::Property::ELLIPSIS_POSITION, DevelText::EllipsisPosition::START);

Handled Ellipsis location for below cases:
Positions: END, START and MIDDLE
TextController: TextLabel, TextField and TextEditor
SingleLine and Muilt-lines with differnat LineWrap modes
Text direction LTR and RTL

END algorithm already exits
START and MIDDLE algorithms added according to END one

Change-Id: If059878f7128141169e95cf237b690ce900c70b3