Folder WebDAV paths have the '/' at the end, this needs to be removed
in RemoteDialog logic while filling the treeview.

Change-Id: I8336de3e08ff030b27b1e48594448ff66106cff6
Reviewed-on: https://gerrit.libreoffice.org/21041Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: jan iversen <jani@documentfoundation.org>
Tested-by: jan iversen <jani@documentfoundation.org>