#743 storing draft in onPause to keep Draft text even when app is destroyed after being paused

src/org/thoughtcrime/securesms/ConversationActivity.java

@@ -305,6 +305,8 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
   @Override
   protected void onPause() {
     super.onPause();
+    // save draft on pause
+    processComposeControls(ACTION_SAVE_DRAFT);
     MessageNotifierCompat.updateVisibleChat(MessageNotifierCompat.NO_VISIBLE_CHAT_ID);
     if (isFinishing()) overridePendingTransition(R.anim.fade_scale_in, R.anim.slide_to_right);
     quickAttachmentDrawer.onPause();