Fixed an error adding duplicate primary position.y

Fixed an error adding duplicate primary position.y

In the target, characters with different glyph heights
(ex: Korean, English: "안녕하세요, hello") are written in same text field

when the character is deleted by one character,
the position of the TextField continuously goes down.

Change-Id: Ic44d79992eec67ae7ddec9e302c95877f90f2580