Bumping gaia.json for 4 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/e836e146aa9b
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #12515 from julienw/913994-conversation-not-shown-after-sending-sometimes

Bug 913994 - [Messages] When sending SMS to a number included in a SMS, ...

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https://hg.mozilla.org/integration/gaia-central/rev/3313fb5d45f2
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 913994 - [Messages] When sending SMS to a number included in a SMS, we should load the thread after clicking on send r=gnarf

The problem was simple: we were not resetting inThread when handling the #new
hash.

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https://hg.mozilla.org/integration/gaia-central/rev/b6b5d914d230
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #12514 from julienw/919962-dont-show-sms-conversion-banner-after-send

Bug 919962 - [MMS] Converting to text layout when sending a MMS r=gnarf

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https://hg.mozilla.org/integration/gaia-central/rev/3bb63873c053
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 919962 - [MMS] Converting to text layout when sending a MMS r=gnarf

We now display the banner in an asynchronous way therefore the previous way to
hide the banner synchronously didn't work.

This patch changes the logic then: instead of hiding the banner after displaying
it, it now prevents the banner from being displayed at all.