(TextLabel Example) Fixed Pan gesture handling
(TextLabel Example) Fixed Pan gesture handling

Problem:   When we are resizing and go past the minimum size of the container and then release, we have to move
           the distance we moved from the minimum size to the our release point again in order to make the
           container resize again.
Reason:    This was because we kept on changing mLayoutSize but did not reset it when the pan starts.
Solution:  Reset mLayoutSize when the pan starts.

Change-Id: I3ded29691e8f1c405847f971d9a89d50aa448fdf

dalihub/dali-demo,dalihub/dali-demo,dalihub/dali-demo,dalihub/dali-demo