Make sure that the selected server is always in sync with the server address (handle Page change, Filter selection, Server selection, Filter change). Changing the address changes the selection, will now also deselect if no address matches. Closes #2003.
Store selected filter for each browser page (internet, LAN) separately.
Store selected server for each filter and browser page separately.
Reenables the important message "No servers match your filter criteria" in case the filter ex...
