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

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https://hg.mozilla.org/integration/gaia-central/rev/941136912948
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #13913 from vingtetun/bug935561

Bug 935561 - [Messaging] Attach icon is kept like pressed when tapping o...

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https://hg.mozilla.org/integration/gaia-central/rev/00e416ae563b
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 935561 - [Messaging] Attach icon is kept like pressed when tapping on it and cancel selecting a content to attach. r=fabrice

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https://hg.mozilla.org/integration/gaia-central/rev/8833fd8808d6
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #13914 from vingtetun/bug938637

Bug 938637 - Some core value selectors does not have a visible pressed s...

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https://hg.mozilla.org/integration/gaia-central/rev/00f7da2bd4fe
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 938637 - Some core value selectors does not have a visible pressed state. r=samjoch