Add chechboxes for specific Ores; support for lists in mcedit.ini; and fix default colors bug

I tried my best to follow current code's style, and to keep each commit as atomic and independent as possible.

3rd and 4th commits are independent of each other, but both depend on 2nd. And 4th also depend on 1st.

They are also ordered in a way that each commit provides a complete new functionality or bugfix