Investigate / rewrite GUIs using FlatLaf #342
Description
Windows and dialogs in emuStudio are very simple and it's hard to extend them or enhance them without writing a lot of manual code related to layouts (e.g. GroupLayout) which is most customizable but also complex to write (defining horizontal and vertical groups). I was looking for some replacement, and found several alternatives. FlatLaf seems to be the best replacement with lot of features, including themes, which seem to be also simpler to use.