Here's what it looks like now:
{F6458157}
Verifications performed:
- There are no actual settings or behavioral changes for any existing users, since browsers ask to set themselves as the default, and distros ship config files already specifying their preferred browser.
- Changing the browser in the combobox correctly updates both `~/.config/kdeglobals` and `~/.configmimeapps.list`.
- The combobox's default setting is now correctly identical to what `~/.config/mimeapps.list` specifies, if anything.
- KRun still does unnecessary URL introspection when there is in fact a default browser set in `~/.config/mimeapps.list` but ~/.config/kdeglobals` doesn't have a default browser set, which is fixed separately in KIO with D17371.