[Merge] lp:~phablet-team/messaging-app/send-typing-notification into lp:messaging-app

[Roberto Mier Escandón ]

Review: Needs Fixing

Just discovered that the composing state is detected after written at least a first blank space in the text of the message. It behaves like the text was empty unless there is at least a blank :O
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https://code.launchpad.net/~phablet-team/messaging-app/send-typing-notification/+merge/296609
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