Editor Single-Axis Manipulation

[JamesTCrenshaw]

Most graphics editors have a keybind or some other mean of allowing the user to manipulate selected objects in one axis without affecting another.

Example, a keybind that only allows movement in the Y axis, only allowing selected objects to be manipulated up and down.

This feature would be really beneficial to the sub editors, and allow far easier construction of new ships with much finer placement of objects.