[Manager] [Simple View] Unable to permanently revert back to default skin

[Vulpine05]

Describe the bug

If the user had selected a non-default skin in the past, they cannot switch back to the default skin permanently. When Manager is closed and opened up again, the skin that was previously chosen would be the last one used.

Steps to reproduce

Example 1:

1. Change to simple view. It is assumed the skin is default
2. Change the skin to a non-default skin.
3. Close Manager.
4. Open Manager again. The skin that was last selected should be displayed.
5. Change the skin to default and close Manager.
6. Open the Manager, and the previous (non-default) skin should display.

Example 2:

1. Repeat steps 1-4 above.
2. Change to another non-default skin. For example, go from CharityEngine to Progress through Processors. Do NOT close Manger.
3. After choosing PTP skin, switch to the default skin.
4. Close Manager.
5. Open the Manager, and the PTP skin will be displayed.

Expected behavior

When the default skin is selected, it should stay applied after the Manager is closed.

Screenshots

No response

System information

• OS: Ubuntu 24.02.2
• BOINC: 8.0.2
• wxWidgets 3.2.5

Additional context

I was not able to reproduce this with a local build on Windows 10.

[sudip-dev]

Hi! I'm new to open source and would love to work on this issue. I'm using Windows and will test and explore the skin persistence logic. Let me know if there are any specific files or behaviors I should be aware of. Thanks!

[LezheGao]

Hopefully #7216 will fix it