Bug 1074666 - Part 2 Change the toolbar icon when participants join and leave. Updated by pkerr,r=Standard8
Bug 1074666 - Part 3 Play a sound when a participant joined a room. Updated by pkerr,r=Standard8
Bug 579208 - Sizes of some XUL elements changes when lightweight themes are applied. r=dao

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extra : rebase_source : f2276fef3f0e0be1cc245a3d889ee396f3d45515