Otherwise a second icon is created when starting a second X11 session, see
https://github.com/Martchus/syncthingtray/issues/142.
Not sure whether this is relevant under Windows and Mac so this change is
only covering the *.desktop file.
A follow up to 0faacaa7c8 to cover the stop button within the launcher
and terminating Syncthing on shutdown/exit. To find the relevant connection
the connection settings are searched for a local URL where the port matches
the port from the Syncthing process log.
* Use a process group / job object via Boost.Process to be able to
terminate sub processes as well
* Do not try to stop the process gracefully under Windows by posting
WM_CLOSE because this has no effect on Syncthing anyways
* See https://github.com/Martchus/syncthingtray/issues/94
The default of 32 px should be fine in most cases and when the UI is scaled
it is also automatically scaled. However, if one has a tray area or Plasma
panel with extraordinarily big icons like latte-dock it might still be
required to render icons at a higher resolution. This is hard to determine
programmatically so I'm just adding a manual setting.
Before this change syncthingwidgets unconditionally included the header
from libsyncthing so it couldn't be used as stand-alone library if
libsyncthing was disabled.
So far the backend libraries' include paths were relative within this
repository. This means the header files could not be used at their
installed location.
This change replaces them with "<>" includes to fix that problem and adds
a new include directory so building everything at once still works.
With this change it should be easier to actually split some parts into
another repository if this one would become too big.
The external inotify tool is likely not used anymore. It makes sense to
keep the concept of supporting additional tools because it might be used
in the future again. So it seems best to give the additional launcher a
more generic name.
* Lazy initialize systemd interface and don't initialize it
at all if the unit name is empty
* Allow to supervise/control system-wide units in addition to
user units (see https://github.com/Martchus/syncthingtray/issues/61)
* Avoid redundant code
