clearComments does't actually clear comments

[ruckustboom]

As stated, AbstractCommentedConfig.clearComments() doesn't actually clear the comments. It clears the comment map, but the entry set still contains its comments, and that is what is referenced when writing the file, so the comments remain.

[TheElectronWill]

Clearing the map should clear the entry set because both are linked. I'll do some tests 🤔

[TheElectronWill]

I see what the problem is (or at least one problem): the comments may be stored in subconfigs, but only the root map is cleaned when clearComments() is called. Therefore the comments remains...
The subconfigs' comments should be cleared recursively.