alan-config: check for the basename of the <file> child when looking at openbox's default items to remove during setup.

This fixes the installation in Vera, as its rc.xml reference the fallback menu-static.xml with its full path.
alan2-setup.sh: execute alan-menu-updater with the eventual $ARGS.
1.20.2
Merge branch 'devel' into debian-devel
1.20.2-1