Impact with terrain after adjusting vessel height

[KSAMissionCtrl]

Thanks for implementing the ability to change the height of the vessel! It doesn't seem to snap properly back to the default settings when you tab through them however, and if you made it lower than normal when it drops to the very fine setting it will try to go through the ground. BOOM! :P

[PapaJoesSoup]

Behavior of the movement mode switch (Tab key) does not result in intuitive behavior. The existing code tries to account for the fact that the user is changing the mode and sets the altitude, but if changes are made to the altitude, these are factored in and can result in vessels going underground.

It seems to me that a separate means to account for altitude changes while allowing mode changes is needed. If a user has not altered the altitude, and desires to change the mode, then the altitude can be set to a preset level (as is the current behavior). However, when the altitude has been changed then the mode changes need to respect the current altitude and not alter it. This would allow precise control over the final altitude set by the user.

With that said, a need for detecting when a user wants to "reset" the mode to its default settings is needed. I suggest adding a key that will allow resetting the altitude to default settings.

[PapaJoesSoup]

Fix in place. code now detects when over water or land. Prevents placing craft below the surface unless in water. Mode changes no longer position craft underground. Additionally, changes made to make altitude changes more intuitive, and if changing altitude manually, movement mode changes no longer change the current altitude of the craft. Added a reset button (Throttle Cuttoff) to reset this behavior back to default.

Will be released with version 1.7.3