Bug 978752 - fix Windows Classic gradient for Australis, r=mconley

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extra : rebase_source : 9653aec995257946f65c826f439539c848da6d63
Bug 963143 - downloads animation no longer showing when button is in Australis' menu or overflow panel, r=mak

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extra : rebase_source : 2e74cb17e9a080a2dd5bd27b501b4fe1719bd310