ENYO-1030: Implement Editor Settings popup behavior

Please, test it and comment.

Do not take attention to UI, it will be changed

Working items in Editor Settings are:
 -high linght active line
 -word wrap
 -right pane
 -font size
 -editor themes
 -programmable buttons

Enyo-DCO-1.1-Signed-off-by: Olga Popova <olga.popova@hp.com>