Fix Issue#73

[xcvb85]

I already created a pull request to discuss all the TODOs before merging:

• Implement engine startup via OHP (Prop)
• Implement engine startup via OHP (Jet)
• Activate 7-segment displays
• Implement remaining settings for autopilot dialog
• F11 key opens autopilot dialog

Don't worry about the new cockpit model. I will fix the mess (just let me know when you want to merge and I will create a new branch). OHP should be in a separate ac-file.

[HHS81]

@xcvb85 what exactly you mean?
The reverse thrust? The Jet version in fact doesn't have a reverse thrust.
The reverse thrust isn't still not working like in real, but that's due to the fact that we would need extra hardware for. It is simply not be possible to simulate it in the sim without any negative side-effects for the user. So I can live with it, until I have an idea....

But your perfomance improvement are great, and the startup as well.

[xcvb85]

The reverse thrust now works as follows:

• Click on latch/press delete and throttle < 10% -> latch up and reverse thrust
• Click on latch/press delete and throttle > 10% -> latch up but no reverse thrust

To be able to activate reverse thrust you must ensure that the latches are down and the throttle is below 10%. If you have a better idea to solve this let me know. In the jet version you don't activate reverse thrust but cutoff in this way (as far as I understood).

Not sure about the performance benefit of maketimer but I read in the forum that this should decrease the garbage collector stuttering.