In the StopwatchNode, allow adding additional buttons and/or removing the play/pause/rewind buttons

[samreid]

As part of the design for phetsims/projectile-data-lab#94 (comment), we agreed we wanted to customize the StopwatchNode by adding a sim-specific button and removing the rewind/play/pause buttons. I described this would complicate the API and implementation of StopwatchNode, but we agreed this was important and worth the effort.

[samreid]

@matthew-blackman and I implemented it above and will request review as part of phetsims/projectile-data-lab#32

[pixelzoom]

In code review phetsims/projectile-data-lab#32 ...

• Please review recent changes to StopwatchNode.ts and how it is used in Projectile Data Lab. See options includePlayPauseResetButtons and otherControls, and In the StopwatchNode, allow adding additional buttons and/or removing the play/pause/rewind buttons #843.

My first thought was that I would not use StopwatchNode here, since it's significantly different from the standard StopwatchNode. But @samreid and @matthew-blackman explained that they wanted to leverage everything else that comes with StopwatchNode. That said, I hate to see more features added to StopwatchNode, but I don't see anything wrong with b491faf. I did add links to this issue in 12c83d2.

[samreid]

Thanks, let's close this issue. We have more stopwatch work to do in phetsims/projectile-data-lab#180 and will continue there.