The attached patch adds an emacsclient.desktop launcher with
StartWMClass=Emacsclient and also makes systemd start the daemon with
name emacsclient.

This is intended to fix a number of shortcomings in emacs xdg/systemd
integration:

1. There is no emacsclient desktop launcher.

2. emacsclient run with the same class/name hints than emacs, so:

2.1 It's not possible to add it to dock/dash/panel favorites since
desktops identify the launcher for a window using its hints. So you
always get an emacs launcher instead of the emacsclient one.

2.2 Even if manually added to dock/dash/panel, launched frames will
not group under this icon but under the one where standalone emacs
instances group.

The only drawback I can think of is that X resources not specified by
class (Emacs) but by name (emacs vs. emacsclient) will fail to apply.
But I don't think this is usual practice. Note that even if xprop
reports Emacsclient as the class hint, resource resolution always uses
Emacs, so we're ok with that.

Best regards
--
Carlos