Fixed and backported for VSD 3.4.

I think we also want this for VSD 3.4.

I have cleaned up the patches for the AppImage. Now the build fails at okular because it needs PlasmaActivities. In master this dependency has been removed so that I'm going to wait for Sune's update of Gpg4win to Qt 6.10.x, etc.

With the product-specific standard locations implemented for T7717: Location of qt-application config files it's now longer necessary to customize the application name of Okular. Closing as wontfix.

The new approach has been implemented and backported for VSD 3.4.

All changes have been backported for VSD 3.4 (because they are closely entwined with changes for T7717).

The new implementation can now be tested (once we have GPD/VSD 4 builds)

Reopen because I'm changing the implementation

New new plan (after discussion on 2025-12-08):

While working on https://dev.gnupg.org/T7962 I realized that https://dev.gnupg.org/T7717#208938 is probably not the best solution for separating the config files of different distributions of Kleopatra, Okular, etc. Changing the application name has many side effects, e.g. it changes the name of the config files, but that's unnecessary because we put the apps' files already in different folders. There are also other side effects that make things complicated (and require many changes in okular). Taking a step back what we need is different folders for VSD, GPD, and Gpg4win (and KDE Okular). And, for Kleopatra, we need different unique service IDs, but let's ignore this for now. That can easily be solved separately. For the different folders it would be sufficient (and maybe even nicer for selective backups) to use something like %(LOCAL)APPDATA%/GnuPG VS-Desktop, etc., as location for all apps' files of VSD/GPD/Gpg4win. Then we wouldn't have to change/patch anything in Okular (or any other Qt apps).

Fixed and backported for VSD 3.4.

Ranking as discussed with @ebo

The remaining issue "Wrong language in GnuPG error messages" is now also fixed. Until there's a new version of libgpg-error I've added the changes as patches.

The root cause is that opening the details reloads the certificate. This triggers a change of the key cache. And that triggers are reload of the group.

Backported for VSD 3.4

In T7495#209088, @timegrid wrote:

When an uncertified cert is uploaded, the main button of the warning message also says Export Certificate. Should this be another ticket?

This is now implemented for Gpg4win 5.