Merge master into 16-tracker-bug

.gitattributes

.gitlab-ci.yml

CMakeLists.txt

LICENSE

ReadMe.txt

cmake_modules/install_helper.cmake

container/arch/Dockerfile

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icons/1uparrow.png

icons/arrow_left.png

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icons/bottom.png

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icons/edit_remove.png

icons/exit.png

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icons/icon.png

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icons/icon_smallest.png