WhisperSystems/TextSecure — pull request #1053 by shenki (2014-03-06 05:14:17+00:00)
Title: ConversationFragment: enable back button to dismiss message detail dialog

The ConversationFragment has a AlertDialog for showing the message details, which sets the cancelable property to be false. This stops the user from being able to use the back button to dismiss the dialog.

By setting it to true, the back button can be used. Tested on Android 4.4.2 on Nexus 5.