Reset command should be able to reset main window position(s)

[Meorawr]

For some silly reason /trp3 reset frames only bothers to reset the positioning data for the toolbar, target frame, and glance bar. It'd be good to extend this to support resetting the position/size data for the main window, NPC talk, currently frame, and extended-related stuff.

May also be an idea to allow us to reset positions individually if this gets expanded, since one might want to reset just one thing rather than all of them.