Minor GUI stuff

[Han Prower]

I've put a pentagon on the normal inventory slot in order to fit the general PureBDcraft style, but of course it looks weird in big slots or text boxes (for other validators I just use a full background to cover over the pentagon): http://snag.gy/VLUqO.jpg

It'd be nice if there was either a different texture used for "big" GUI slots and another texture again for text boxes -OR- a different texture used for "general" inventory slots that is similar to the validator textures.

Oh, also, as you can see in that screenshot the scroll bar texture doesn't work correctly. It repeat on the horizontal and the right edge is clipped.

[Han Prower]

Also, in the sequencer GUI, I understand why the genetic code text falls out of the box as the font width's vary between fonts, but I'm unsure as to why there appears to be 2 overlapping which is very apparent on custom fonts: http://puu.sh/cNTn8/adecd327b5.png