Check glyphs are laid out in text-view.
Check glyphs are laid out in text-view.

* Check there are glyphs laid out before performing operations

Change-Id: I508959209b405522501b47832e158042bf09d52c
Signed-off-by: Victor Cebollada <bd4ca07245b7f4eb2d3ace02513dff6e050d7f4b@samsung.com>

dalihub/dali-toolkit,dalihub/dali-toolkit,dalihub/dali-toolkit,dalihub/dali-toolkit