Drawing tool refactoring#8

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ruzhnikov wants to merge 8 commits intomasterfrom

Commits on Dec 3, 2021

* new bunch of functions for Shutter::Draw::Utils
ruzhnikov
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Commits on Mar 29, 2022

Merge branch 'master' of github.com:ruzhnikov/shutter into drawing_tool
ruzhnikov
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Commits on Jun 15, 2022

* working on more tests for Shutter::Draw::Utils
ruzhnikov
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