Spectacle's Desktop file assumes that `qdbus` is in $PATH. However this is not
guaranteed; the actual name of the command is `qdbus-qt` in the distro's Qtcommand lives in the Qt binaries dir which is not typically in $PATH,
and distros typically create symlinks with different names in `/usr/bin`, but not all
binaries dir. Distros typically createcreate a second compatibility symlinks to these commands in `/usr/bin`, but at `/usr/bin/qdbus` that points to the version
not all go a step further and create a second cimpatibility symlink at `/usr/bin/qdbus`for the current Qt version.
Therefore, we should find the command in the Qt binaries dir itself rarrather than relying
on these compatibility symlinks.
BUG: 413007
FIXED-IN: 20.04.0