Clear selection rectangle on tap gesture

Clear selection rectangle on tap gesture

On branch m42 the selection rectangle is cleared when on tap gesture is handled.
This does not happen on m47.

Because of the above WCS#41 fails when JavaScript preventDefault() Event Method
is used to cancel mouse down event. Context menu is being hidden but the
selection rectangle is still visible. This patch makes m47 to works as m42.

Original beta/m47 patch:
- http://165.213.202.130/gerrit/#/c/98569/

Bug: http://web.sec.samsung.net/bugzilla/show_bug.cgi?id=15140

Reviewed by: a1.gomes

Change-Id: I71a6ffe0b0645d4e91811b2eb87ff65f9169d13b
Signed-off-by: Piotr Krysiewicz <p.krysiewicz@samsung.com>