When selecting a Sequence flow of the Label for the Sequence Flow, highlight the label/sequence #369
Description
Describe the Problem
When you select a Sequence flow the label should also be highlighted so you can quickly tell which label corresponds to the flow.
When you select a label, the sequence flow it belongs to should be highlighted so easy reference to which sequence the label belongs to.
When you have complex processes with lots of flows, the labels can be mixed up, especially when moving and resizing
Solution Sketch
Show a fine, dashed line when hovering a label that links the label to the labeled element:
Depends on bpmn-io/diagram-js#290