When -multi option is selected, gui/create-item doesn't set quality neither on stackable nor unstackable items. Fixed this quirk.
No refactoring or optimizations. Just moved a variable and added code inside the createItem function.
Because it's a lot easier to link to bug reports this way.
The migration is mostly just a copy-paste job, but I'm using keybinding
styles where appropriate too.
After an [extensive, in-depth discussion about the merits of the name](https://github.com/DFHack/dfhack/issues/634), I decided that "hack-wish" was a dumb name and figure changing it will make everything easier for everyone forever.