lxqt-sudo added to Exec line of software-properties-qt.desktop breaks use in KDE Plasma Discover

In the upload: https://launchpad.net/ubuntu/+source/software-properties/0.97.8

there is a change in the software-properties-qt.desktop files which is (a) not documented in the changelog, and (b) not communicated to other flavour users of this application (Kubuntu in this case).

-Exec=software-properties-qt
+Exec=lxqt-sudo software-properties-qt

This results in Plasma Discover not being able to launch software-properties-qt, as it uses privilege elevation via kdesu of whatever is in the Exec line, and lxqt-sudo added there makes this fail.

Context to this is:

For Cosmic release Lubuntu developers requested agreement from Kubuntu to the porting of the software-properties-kde package to pure Qt, so that it could be used in both Kubuntu and Lubuntu (lxqt) without pulling a lot of KDE dependencies into Lubuntu's lqxt images/installs. This was on the condition that despite being renamed to -qt, it remained completely as a tool for joint usage between the two flavours.

The original sofware-properties-kde was meant to be launched by applications and was set not to show in DE menus by default.

It seems that Lubuntu wishes to now have it useable directly from a 'start'/'search' menu, hence making it visible and adding the lxqt-sudo in the Exec line to facilitate launch with privilege escalation.