KLocalizedString: Using an empty domain

[jwrober]

Describe the bug

[warning] freeciv21-client - KLocalizedString: Using an empty domain, fix the code. msgid: "&Yes" msgid_plural: "" msgctxt: "@action:button"
[warning] freeciv21-client - KLocalizedString: Using an empty domain, fix the code. msgid: "&No" msgid_plural: "" msgctxt: "@action:button"
[warning] freeciv21-client - KLocalizedString: Using an empty domain, fix the code. msgid: "&Yes" msgid_plural: "" msgctxt: "@action:button"
[warning] freeciv21-client - KLocalizedString: Using an empty domain, fix the code. msgid: "&No" msgid_plural: "" msgctxt: "@action:button"

To Reproduce Steps to reproduce the behavior:

1. Start client from command line
2. See error

Expected behavior No localized string errors

Screenshots N/A

Platform and version (please complete the following information):

• OS: Linux -- KDE Neon running Qt 6
• Freeciv21 version: 3.1-beta.1
• Ruleset/Longturn game (if applicable): N/A

Additional context Found while testing PR 2288, but don't think its related. I am running on KDE Neon w/ Qt6, however compiling like normal on Qt5. Don't know if its related, but thought I'd mention it.

[lmoureaux]

Looks like a bug in the latest Kde platform plugin.

[lmoureaux]

KLocalizedString is part of Ki18n, which we do not use. So it's not our bug. More context about this warning in this blog post