Fixes #164

(cherry picked from commit 79cff102e4461c4756a1569f87bb92e03c8f0c55)

Signal completed authentication instead of opening the connection directly.

Signal completed authentication if we have needed informations.

Hide the authentication dialog once the user submits the info or cancels it.
Set authentication_func to null after its use.

Differentiate between connecting to a remote machine and between switching
to already established connection by creating switch_to method for switching
to a connection instead of connecting to it.

By connecting to the signal we can react accordingly.

Connect to disconnected signal so we can properly switch to collection view
and mark the connection as disconnected when the connection was disconnected.
This is needed when closing the connection from inside of the connection.
Mark the connection is not connected in such case.

Add this check to be sure that we don't try to connect when
we are already connecting.

Fix the build by using newer FreeRDP and set
libdir to /app/lib/.

This fixes appstream compose.

Signed-off-by: Marek Kasik <mkasik@redhat.com>

(cherry picked from commit 6ffb821d86c9f3bc5f4cc40ac8c3819a6d7019a4)

(cherry picked from commit ea0352d7e9a0faf0ab9527df443e185f5fbfece3)

Fixes #48

Signed-off-by: Marek Kasik <mkasik@redhat.com>