Changes cursor handle name from 'Efl.Text.Cursor.Cursor_Data' to
'Efl.Text.Cursor.Cursor'.
Also, replace all usages of Efl_Canvas_Text_Cursor
with Efl_Text_Cursor_Cursor as the handle for the cursor.
Need to handle this with special care as Efl.Text.Cursor is used in
some functions that are specific to Efl.Canvas.Text, was well as
functions in Efl.Text.Cursor interface.