Implemented Custom Grouping

[TheArmagan]

Implemented the custom grouping settings that allows you to actually specify which blocks you want to export one by one or as in group.

[erich666]

Thanks for working on this, but I don't quite understand the feature. So if you check Custom grouping you get a dialog and can choose whether a type gets grouped or made into individual blocks?

This commit is quite hard to read, as a lot of the "changes" are just reformatting changes, no real change to the code. For example, ObjManip.cpp is shown as "+7,575 -5,837" - that's 7575 lines added, 5837 subtracted. Mineways.cpp has +2,618 -1,881. This makes it almost impossible for me to evaluate the actual code changes, so I think I have to pass on folding this one into the code for now. If you want to resubmit with only the true changes, that would go a long way towards me being able to understand what you're adding and folding it in.

[TheArmagan]

So if you check Custom grouping you get a dialog and can choose whether a type gets grouped or made into individual blocks?

Yes

I will eventually do better commit some-day but not yet. It currently functions good enough for me I needed to make this for my small game project where player's able to mine specific areas.

[erich666]

Thanks. This does seem quite specialized, so I'm not sure I want to add it as a (somewhat complex) feature, but I'll at least mention it on the Mineways Discord channel for now. I hope to have more time in the summer where I can try it out. Very cool that you've added a feature! Now I'm feeling a bit guilty about the groups I've made in some cases, where a bunch of simple block types all get lumped in together.