Improvements#133

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bartoszhernas wants to merge 9 commits intostefanoa:masterfrom

Inventorum:master

Commits on Jan 23, 2014

Commits on Oct 21, 2014

Commits on Nov 29, 2014

Translations
bimusiek
committed

Commits on Jun 9, 2015

weak references to avoid memory leaks
bartoszhernas
committed

Commits on May 18, 2016

Fix when changing visible menu items
bimusiek
committed