[3.0] Text's selection popup mirroring.

[3.0] Text's selection popup mirroring.

* Reverses the order of the text's selection popup toolbar
  when the platform's language is right to left.

* Scrolls to the first reversed button (that's the end
  of the toolbar).

Change-Id: I58c5bbc5402810e0bd94510cc3f12143b572e395
Signed-off-by: Victor Cebollada <v.cebollada@samsung.com>