NPC menu rework

I can't be the only one who tends to accidentally click "purchase decorations" instead of "sell items". They're just a pixel apart from each other and it's not a great design.

Suggestion:

1. Group all the dialogue from each NPC into a "Dialogue" category in order to reduce the window size. Just look at freaking Zana; the window is humongous!

2. The above opens up space to split "purchase decorations" and "sell items" (and "purchase items") into separate categories, separated by the already existing visual divider. Now the options aren't just a pixel apart, but actually have a proper divider between them.

I know this will likely be ignored like 99.9% of feedback on these forums. But hey, can't help myself.