A trigger "key" that listens for key events in the DOM
Options:
- event - The event to filter on, keyDown | keyPress | keyUp (Defaults to keyPress)
- key - The key to filter on, ex. "a" or "Enter"
- ctrl - If ctrl should be pressed or not (If omitted, then state of ctrl is not checked)
- alt - If alt should be pressed or not (If omitted, then state of alt is not checked)
- shift - If shift should be pressed or not (If omitted, then state of shift is not checked)
- meta - If meta should be pressed or not (If omitted, then state of meta is not checked)
- focus - If anything should be in focus for the event to trigger, supports concept and view
- focus.exactConceptMatch - Should an exact match on concept be enforced. If no focus.concept is defined, the owning concept is used instead.