Clear text selection after 'Copy' command.
Clear text selection after 'Copy' command.

Patch hides the selection handlers and clears text selection
after execute copy command in both editable/non-editable content.

Issue: CBBROWSER-4

Change-Id: Ib1e4158955afc7e5c73f8c9dd4be09c79de60b73

hgl888/chromium-efl,hgl888/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,crosswalk-project/chromium-efl