MAMEUI: several dialog windows improvements

[mame-licious]

Hi

Would it be possible to make MAMEUI even more user friendly by changing some small dialog window properties?

I'm thinking of:

- putting the dialog windows in "Options" menu to the center of the screen. It's easier if all windows appear in the center of the screen.

Also the "properties",  "properties for drivername.cpp" and "add to custom folder" windows if you right click a game.

And finally "View" -> "Custom filters" and  "View" -> "Customize fields" windows.

I don't know if MAMEUI uses Win32 API or MFC but Google AI gave this example implementation for Win32 API and it seems very easy.

https://ibb.co/14Gy3mL

https://ibb.co/Tq13WpMC

 

- making the "add to custom folder" window (right click a game) much bigger when it's displayed (or certainly resizable by the user, if this is possible) since it's way too small to work with INI files with long file names and a lot of filter groups inside and can't be resized by the user. See screenshot

https://ibb.co/PvrkW1Hk

 

- adding a messagebox that appears after clicking "delete game settings" and "reset play stats" (right click a game): "game settings of game X deleted" and "play stats of game X reset". Right now there is no feedback to the user and this is a bit weird.

 

Thanks in advance!