Bug 982027 - moving item around in Australis' customize mode shouldn't remove custom context menu, r=jaws

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extra : rebase_source : 5d756bcfe2a7906f15d69405b8b23070ac293ec9
Bug 978309 - add custom arrows for Australis bookmarks menu panel on Windows and Linux, r=mikedeboer

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extra : rebase_source : 61e9c45b52714e41d74f2743863693af595a2d89
Bug 981548 - bookmark star animation disables click on bookmarks widget during transition, r=mak

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extra : rebase_source : a4f5f1ba45da12269eae0ca05cc366b14cdec906