Bug 840069 [Messaging:MMS] Expose .on to attach handlers to Compose actions, like 'input'. Expose getText() to get text content. Update ThreadUI to use Compose.getText() and Compose.setMaxLength() as well as expose state of empty/non-empty via isEmpty()
Merge pull request #1 from danheberden/840069

Bug 840069 [Messaging:MMS] Expose .on to attach handlers to Compose acti...