Add ability to reorder lexicon priority/load order with indicators in UI whether top of the list is highest or lowest priority

I'm not 100% sure yet what happens if you have multiple lexemes in multiple lexicons with the same graphemes. But I assume it only keeps either the first or last instance of duplicate graphemes.

This could be useful for users who install multiple lexicons from the repo with alternative pronunciations for the same words.

As it is now, users wanting to reorder lexicons would need to remove all of them from the configuration window and re-add them in the desired order.

Maybe add up and down arrow buttons to each row where the lexicon is listed in the config. I don't know if drag and drop is possible, but I don't think that is a good idea because Dalamud UI windows at least attempt to be gamepad/controller friendly and drag and drop would definitely not be gamepad friendly.