AppletConfiguration: add "Report a Bug" button to config window
Requires frameworks/kcoreaddons!263 (merged)
When an applet's JSON metadata defines the bugReportUrl key, its Configuration page will now display a "Report a Bug" button that the user can click on to quickly and easily file a bug. This should make it easier for people to file targeted bug reports that are automatically filed to the right place so they don't need extra work by big triagers to move them.
If the applet does not define the bugReportUrl key in its JSON metadata file, it doesn't get this button, and there are no visual changes.
BUG: 370195 FIXED-IN: 5.27
This MR also has a second commit that adds the required data to all applets in the plasma-desktop repo. If the approach taken by this MR is approved and merged, I will push commits to add this metadata for all applets in other plasma-aligned repos too.
