Disconnected GVFS / SMB share causes Thunar to not open

When navigating a network share and the internet connection is lost, attempting to open any sub-directory or file will cause Thunar to freeze for approx120 sec.

If Thunar was closed before the network was disconnected, Thunar will not appear until over a minute (approx 80 sec) after Thunar was launched. In this case Thunar will refuse to open whenever a share was mounted, regardless of whether the share was being actively navigated prior to Thunar being closed.

Steps to reproduce.

1. Connect to a network with a network share.
2. Open Thunar.
3. Mount the share.
4. Close Thunar.
5. Disconnect from the network.
6. Open Thunar.
7. Thunar will not appear for over a minute. (approx 80 sec)