Note that the icons here are for modflow6.xml and don't work for the TreeItemSelectorDlg. To get that to work you must add the icons to xmsguipy.

To update the .resources/mfqrc.py file:

1) Run this (with the paths fixed for your machine):

C:\links\python_gms_dev\Scripts\pyside2-rcc.exe mfqrc.qrc -o mfqrc.py

2) Replace the old mfqrc.py with the new one (if it isn't already).
