sebastian/threema-web: Threema-web, clone of the official github repo from 12.2020

Lennart Grahl 4e9acd0fb2 Fix the Future to be marked as done when using the inner executor (#866)		6 lat temu
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angular-inview	77c50b7ffb Use document focus instead of page visibility API (#644)	6 lat temu
future.js	4e9acd0fb2 Fix the Future to be marked as done when using the inner executor (#866)	6 lat temu