Use labels to allow start/stop of multiple components

This idea needs some refining, but in flows that are organized logically into areas of responsibility but for coherence are not subgrouped into Process Groups, labels are sometimes used to visually group related processors.

I'm proposing that double-clicking or right-clicking a label and selecting a new menu option "Select components" would then select all components (I believe this is called "creating a snippet") covered by the label and allow for starting/stopping the "group" at once.