Making the photo preview (thumbnail) smaller, since currently some pictures are so big and covers most of the screen.
(Future update is to make the size configurable by the user e.g. Small, Mid, Big. Also make the size relative to the phone display resolution and not fixed)
Merge remote-tracking branch 'origin/master'

Conflicts:
	TMessagesProj/src/main/java/org/telegram/ui/ChatActivity.java