Add Text Area Size preference

This commits add the ability to set the size of the editable
text are for composing messages.

Arbitrary Restrictions:
Min Limit - 2
Max Limit - 15

Change-Id: I20261af0eb7e1daf80327df4cfde6b7efe766b1d
Nit-pick prefrences display.

Change-Id: Ia0c4e4d0c2a61973c0b3f6f19264916d239b94e7
Signed-off-by: Derek Cannata <thederekjay@gmail.com>