[PATCH] Fix selecting binaries from component chooser KCM

[PATCH] Fix selecting binaries from component chooser KCM

In the kcmshell for a component chooser we use the open with dialog to
select services for various scheme handlers.

If you select a binary instead of a .desktop file a temporary .desktop
file is created in ~/.local/share/applications

This is in the format
Exec=someBinary
MimeType=x-scheme-handler/http

When we then use this application for launching KIO::DesktopExecParser
then (sort of correctly) determines that that the chosen service cannot
handle the http scheme because even though it is a scheme handler it
does not have a "%u" in the exec line.

This leads to us potentially loading websites via kioclient or kio-fuse.

Testing done:
 - kcmshell5 component chooser
 - web browser -> other -> type "/usr/bin/firefox"
 - kde-open5 http://kde.org
 - Previously this gave a local URL, now it is correct

Gbp-Pq: Name upstream-8ad69215-fix-selecting-binaries-from-components.patch