Messaging: Fix the order of the Mark read action

Change-Id: I7ba5a08f67de57c8b9be2b037c474d517bcc2c4f
Re-implement SMS/MMS Mark all as Read option.

Change-Id: I199207441dc37393d733e3af443730367d352f2e
Add font size to Message threads

Change-Id: I71d8a1476d39fb8a7e1de3a3db8c5ed5be0d7d65

Conflicts:

	res/values/arrays.xml
	res/xml/preferences.xml
	src/com/android/mms/ui/MessagingPreferenceActivity.java