Better modeler menu actions with new diagram-js

[jarekdanielak]

Related to bpmn-io/diagram-js#661

Proposed Changes

An attempt to make menu actions behavior more predictable. With new implementation of diagram-js#Canvas we can have a better understanding of what context user is working in: modeling, interacting with pop up, using properties panel etc.

Notes to self:

• Before merging, revert package-lock.json changes.
• Change BpmnEditor for Camunda 7.

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}

[github-actions]

This Pull Request targets develop branch, but contains fix commits.

Consider targeting main instead.

[jarekdanielak]

Blockers:

• Undo/Redo actions trigger twice and seem to trigger when focus is outside of canvas, despite being dependent on canvasFocused parameter.

Nice to have:

• Edit label action can be triggered with keyboard (E) for multiple selected elements, despite being dependent on selectionLength === 1 and menu action being disabled.