Fixing Modular Panels (GUI Panels)

[Anticept]

Opening this issue because there is a wire extra called Modular Panels, which was incredibly impressive waaaay back when they worked (prior to the creation of UWSVN).

They were panels that you could add "widgets" to, which created, interacted with, and deleted inputs/outputs for the panel. These were incredibly useful for spaceship cockpits and such because you could put controls into a few panels, instead of putting individual buttons all over the place.

I had to purge the panels in the following commits due to problems it was creating in the repo:

4840e76

4082dbb

@thegrb93 did some fixes to them in PR #71

ed04148 is the commit when I first merged the branches together. This might make things a little easier than combing two different commits and changes, but keep in mind that there are also a couple of other broken things that were in that old branch too (adv hud indicator, wire hud indicator 2).