Optimize performance

[kagikn]

Closes #12
No need to call Enum.GetValues every time...

[kagikn]

I should have noticed Tanjitsu optimized performance for the shvdn3 branch in #68 before I made this PR...
OK, will make more commits for optimization.

[kagikn]

Disable certain controls would be a better idea. The default interaction menu seems to disable only the controls that prevent user from operating menus or cause slow mo. For example, the default interaction menu doesn't disable the VehicleBikeWings control.

[kagikn]

Btw, why don't you introduce AppVeyor? This makes builds per commit, and you can let people use the builds with this. I use it for my scripts for SHVDN, and you can use it, too.

[Guad]

That's a DivideByZeroException right here if MenuItems.Count is 0. You should move all item-size independent code to the top of the function and then return in the middle if there are no items.

[Guad]

As for AppVeyor, I doubt many people would use it. I'm waiting for SHV.NET 3.0 to release a final version but I have no idea when is that coming

[kagikn]

Now descriptions work well as before.
I have no idea when SHVDN v3 will come, too.
And one more thing, I'm sorry if I bothered you with AppVeyor.

[Tanjitsu]

@Guad with this being Master, i guess we will need to duplicate this into the shvdn3 once its ready ?

@kagikn at the start of the Draw Method. You can remove

Point safe = GetSafezoneBounds();

It is being done in DrawCalculations :)

[Guad]

@Tanjitsu Yeah I'll take care of that

[kagikn]

So, will you merge this PR if there are no problems?

[Guad]

Yeah, sorry for the delay