[4.0] Fix the cursor position after text selecting using tap

[4.0] Fix the cursor position after text selecting using tap

- If the user select some text by tapping, then when the selected text is highlighted,
 if now the user press left or right arrow key (without shift key),
 the cursor should be at the beginning or the end of the selected key.
 (depending on whether you press the left or the right arrow key)

Change-Id: I5f221b7f4eafbabde54a64f514949931ce235175
Signed-off-by: Seoyeon Kim <seoyeon2.kim@samsung.com>