Improve signal handling for kdewallet#3

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purejava wants to merge 5 commits intocryptomator:developfrom

purejava:feature/ImproveSignaling

Commits on Nov 11, 2020

Implement PropertyChangeListener interface
purejava
committed

Commits on Nov 14, 2020

Add missing PropertyChangeListener
purejava
committed

Commits on Nov 15, 2020

Commits on Apr 18, 2022

Merge branch 'develop' into feature/ImproveSignaling
overheadhunter
committed