Add more controls to 4D sequence playback

Currently user can play sequence at three different speed; user can also pause the playback. 

User would want to step forward and backward to see static visual plan on a specific day, to talk about it and discuss with the team. 

Consider including more controls:

- Play

- Pause

- Stop

- Step backward (1h, 1day)

- Step forward (1h, 1day)

When sequence is being played, it is tricky to pause. Consider enabling keyboard shortcut so user can quickly pause and resume playing again: 

- press Space key on keyboard will pause. 

- press Space key one more time will resume playing.