Feature table hint

[TheElan]

Adding a tooltip which would tell how to use this:

1. That you can drag & drop or drag & right-click to combine and draw
2. (if you have research mastery unlocked) Holding ctrl will perform a combination of up to 10 times (also works with research mastery for shift-click to create aspect)

This was originally there, documented in thaunomicon and readme, but I suppose it won't hurt on being clear here. Also button will change colour when reaching research mastery just to give player a hing that something changed and bait them to check it out again.

(look near scribe tools)