Flightcomputer - better manual delay

- added a new button to the manuel delay field to execute the delay
- added a new button to every queued command to set the manuel delay right after the queued one
- added tooltips for both

Preview:
![clipboard01](https://cloud.githubusercontent.com/assets/7722222/5554963/1f480d1a-8c86-11e4-9606-ace44566671e.png)