feat(layer-ovals): add oval deletion/editing functionality

requested review from @KonradAt

deleted the feat/MIN-144-updating-layer-using-websocket branch. This merge request now targets the development branch

approved this merge request

added 15 commits

reset approvals from @KonradAt by pushing to the branch

enabled an automatic merge when all merge checks for b3f96b15 pass

merged

mentioned in commit 21cd9740

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