Install Subsurface icon

We want to install the Subsurface icon so it can be used e.g. in menus.
(Commit ee5d8e3c moved the icons to resources, but the application icon
is special case, that should be installed globally.)

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Disable DC device node if it is not needed

This patch disables/enables the DC device node based on what type of
transport the selected DC uses. The only time the device node field is
used is if the selected DC uses a serial transport type. IrDA and USB type
transports do not use the device node.

Signed-off-by: Benjamin Fogel <nystire@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fix warning about initialization ordering

I cannot tell what the potential impact of this might be, but the fix is
trivial.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>