Generalize fix for swallowed hover events

[azeghers]

Replaces the old drag hover fix with one that works in a general fashion only on element.* level.

Related to bpmn-io/bpmn-js#1366

Acceptance Criteria

• Corresponds to the concept
• Corresponds to the design

Definition of Done

• corresponds to the design principles
• corresponds to the code standards
• passes Continuous Integration checks
• available as feature branch on GitHub
  • contains the cleaned up commit history
  • commit messages satisfy our commit message guidelines
  • a single commit closes the issue via Closes #issuenr

[barmac]

Closes bpmn-io/bpmn-js#1366

When we create a solution for an upstream issue, the fix does not solve the issue yet. It will be the update of the dependency which solves the problem and the fix can only be Related to bpmn-io/bpmn-js#1366. For example, have a look at camunda/camunda-modeler#1997

[barmac]

I've tested this on my machine and it works correctly when the new module is included in bpmn-js.

[azeghers]

I have made the HoverFixModule a dependency of the DraggingModule, so that anything that imports it initializes the hover fix in the process. This should implicitly enable it everywhere, so long as the dragging module is used.

[azeghers]

Additionally, the tests should now also ensure that the element-level hover fix doesn't need the dragging module bootstrapped to work, and that the dragging-level hover fix doesn't need the hover fix module bootstrapped to work.

[nikku]

One last thing and we got it, I believe!

[nikku]

🆒