Regression: first item in ordered plugin dialog is empty

[matterhorn103]

Avogadro version: (please complete the following information from the About box):

• Avogadrolibs: 1.99.0
• Qt: 5.15.2

Desktop version: (please complete the following information):

• OS: Linux AppImage, Windows, macOS
• Version: various
• Compiler: for self-compiled build, clang

Describe the bug
The bug that I described and fixed here seems to be back.

Weirdly, it doesn't occur on my personal build of Avogadro from the latest codebase. However, it does in the 1.99 AppImage, I get the impression it's also happening on Windows, and @JGrantHill also reports it happening on macOS (ARM).

To Reproduce
Steps to reproduce the behavior:

1. Install the avo_xtb plugin
2. Open the "Configure..." menu or anything else that has a dialog e.g. Run or Conformers
3. Observe that first field is always empty, even after entering a path and saving the config, or after adding the path manually to Avogadro/commands/avo_xtb/plugin.json

[avo-bot]

This issue has been mentioned on Avogadro Discussion. There might be relevant details there:

https://discuss.avogadro.cc/t/regression-first-item-in-ordered-plugin-dialog-is-empty/5320/1