Overview of changes in 3.15.91
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* Bugs fixed:
 738527 Fix crash when trying to use window after it has been destroyed
 740425 base-item: Thumbnail local items before remote ones
 744841 main-window: Prevent multiple about dialogs from opening
 745070 indexing-notification: Fix the lifetime of the miners-changed handler
 745071 application: Fix a crash when stopping the miners
 745072 view-model: Fix the lifetime of the info-updated handler

* Updated translations:
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