[REFACTOR] Compliance Rules: review the popover on panning and zooming

[tbouffard]

Currently, there is an issue when panning and zooming (same root cause as for #2 and #4).
When panning, the popover size changes or the popover disappears.
When zooming, the popover size doesn't change accordingly to the size of the activity it is attached to.

compliance_rules_popover_moving.mp4

Notes

The panning issue may be fixed: see process-analytics/bpmn-visualization-examples#378 (comment)
For the zoom, it may requires to check the poper.js 'sticky' and 'appendTo' properties.