Kernel: Enable icons in editable DynamicTreeTable cells

Fixes #4135

There also is a respective af3 branch 4135 that can be used to test and also shall be merged.

changed milestone to %AF3 2.20 - Feature Freeze

added Type::Feature label

requested review from @eder

assigned to @eder

requested review from @barner and removed review request for @eder

mentioned in issue af3#4135 (closed)

added 7 commits

• 08ffc05c...fd9b3539 - 5 commits from branch master
• 217280d5 - Merge branch 'master' of https://git.fortiss.org/af3/kernel.git into 4135
• 880aa7f5 - RED

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added 1 commit

• 328e8a88 - YELLOW

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added 9 commits

• 328e8a88...ddf581e4 - 7 commits from branch master
• b2f182a6 - Merge branch 'master' of https://git.fortiss.org/af3/kernel.git into 4135
• 3d435db8 - GREEN

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enabled an automatic merge when the pipeline for 3d435db8 succeeds

merged

mentioned in commit a58cc919