New features:

* Ctrl-Tab and Ctrl-Shift-Tab to cycle tabs now loop around if reaching the end of the tab list

Bugfixes and minor changes:

* Fix crash on showing/hiding of directory trees after closing a tab
* Tabs no longer become unresponsive if not approving to close a busy tab
* Directory comparison did not work properly on all but the first tab
* Fix spurious error messages if connecting to a new site while synchronized browsing is enabled
* *nix: Work around a bug in KDE preventing restore from minimize to notification area
* Do not show update dialog if there is already some other dialog open
* Fix synchronized browsing option on site-specific bookmarks