[Merge] lp:~lanoxx/indicator-applet/fix-duplicate-icons into lp:indicator-applet

[Dmitry Shachnev]

Hi Sebastian!

> If I notice anything strange, then I will let you know.

So did you notice anything strange? If no and you don't want to test for some more time, then I think we can land it.
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https://code.launchpad.net/~lanoxx/indicator-applet/fix-duplicate-icons/+merge/390344
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