disable wheels by default, since is not very good.
Revert "don't show in GUI the reference button when the relevant parts aren't"

This reverts commit 54a37e3cd89c1032ab6453b0ad15c2b19d4c18f3.

Conflicts:
	Plugin/Gui.cs
make the reference button part of the table
changed the string format for values from F2 to 0.##
better default window position
refactor
rename MarkerVectors to MarkerForces so is consistent with ModuleForces.
extra debug info in the vector labels
fix physicalSignificance code detection.

There are actually two properties that control this:
part.PhysicsSignificance
part.physicalSignificance
quick fix for the dV reading in 0.23.5
Add scaling for the CoT and CoL markers.
code trim
CoM toggle button now toggles all mass markers when the plugin is enabled