Merge m-c to fx-team.
Bug 944255 - about:start bookmarks and history tiles cut off when using split views r=sfoster
* * *
Bug 944255 - Test fix

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extra : rebase_source : cee8e82050c3c95bd83285712567e08e3b9db5cf
Bug 915499 - Fix image loading/rendering logic in circular-progress-indicator binding. r=rsilveira
Bug 944114 follow-up - pass MouseEvent.button instead of the MouseEvent to _countMouseUpEvent. r=me.
Bug 901207 - Cmd/Ctrl+K should open menu panel when search bar was moved there. r=Gijs

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extra : rebase_source : bde48e905cb3b2eb12e148efb8867b52f23f8610
Backed out changeset 3332e2f1ede3 due to missing Australis in commit message.
Backed out changeset c083d7a68fd2 due to missing Australis in commit message.
Bug 944114 [Australis] follow-up - pass MouseEvent.button instead of the MouseEvent to _countMouseUpEvent. r=me.
Bug 901207 - [Australis] Cmd/Ctrl+K should open menu panel when search bar was moved there. r=Gijs DONTBUILD
Backed out changeset 371cd4b623de (bug 901207) for m-bc orange
Merge m-c to fx-team
Bug 926014 - Support CSS source maps; r=dcamp

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rename : browser/devtools/styleeditor/StyleEditorPanel.jsm => browser/devtools/styleeditor/styleeditor-panel.js
bug 944168 - null pointer when adding tab with GeckoView r=mfinkle
bug 944104 - support creating a GeckoView programmatically r=mfinkle
merge fx-team to mozilla-central