Bumping gaia.json for 5 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/514b47fbaae1
Author: lodr <salva@unoyunodiez.com>
Desc: Revert "Merge pull request #13708 from gitmai/bug-937240-remove-mindgap"

This reverts commit 445a9fb8deddd15e617f000ef208bddbedd28f0b, reversing
changes made to a43eabc27773e3a4566645d58d1de6309503b5e0.

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https://hg.mozilla.org/integration/gaia-central/rev/0cedc44152b3
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #13937 from gasolin/issue-941552

Bug 941552 - [Flatfish] pressing sleep menu icon duplicates and overlapp..., r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/8982a1be2a89
Author: gasolin <gasolin@gmail.com>
Desc: Bug 941552 - [Flatfish] pressing sleep menu icon duplicates and overlapped with text

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https://hg.mozilla.org/integration/gaia-central/rev/8f60195b69ec
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #13942 from gasolin/issue-942020

Bug 942020 - [Flatfish][Clock] button in Timer & Stopwatch not big enoug..., r=ian

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https://hg.mozilla.org/integration/gaia-central/rev/b48c339ba269
Author: gasolin <gasolin@gmail.com>
Desc: Bug 942020 - [Flatfish][Clock] button in Timer & Stopwatch not big enough, right margin larger then left one