KWin for wayland uses the `.desktop` file to determine whether a process
is allowed to access some wayland services.
This would be fine if there was a stable interface to map a process to a
`.desktop` file.
Since there is no such interface, they are scanning `.desktop` files for
one where the executable path matches the resolved file "exe" from
`/proc/$PID/exe`.
This would be fine, if we didn't wrap many (most?) KDE/Plasma binaries.
Since we are wrapping binaries, the `exe` symlink points to a wrapped
binary. No `.desktop` file will match for the wrapped binary.
The solution here is to peel away at the `.${name}-wrapped` layers until
we have the intended name for the executable.
It is expected that no `.desktop` file will ever point to a wrapped
binary.
Nix expressions provide all the features that Quilt series files have,
so using those instead is pointless. Also, lib.readPathsFromFile
(the function used to read series files) has the following warning:
> NOTE: This function is not performant and should be avoided.
This also removes some orphaned series files, and unused references to
copyPathsToStore (which were probably missed in previous commits
where calls to lib.readPathsFromFile were removed)
