Handle events outside of window (i.e. cycle, dispensation)

[benaltair]

This will be necessary for the highest level events, but may also be needed for lower level events depending on how zoom levels are rendered. Likely a faded out version of the higher level event will be shown, which can be clicked on to zoom out. Users could also click anywhere outside on the timeline to zoom out perhaps.

These events which go further should be indicated by a > border or something.