xfce4-session: Japanese translations for shutdown dialog buttons make dialog too wide for 1024x768 screen

Package: xfce4-session
Version: 4.4.1-1ubuntu3

If you select 'Japanese' as your language in the initial login dialog on xubuntu, then (obviously) xfce appears in Japanese. If you then select the 'exit door' icon to bring up the dialog offering you the choice of "switch user/log out/restart/shutdown/suspend/hibernate" then the dialog is too wide to fit completely on a 1024x768 display.

This is because the Japanese translations for these button labels are much wider than the English ones, so the dialog box gets laid out with very wide buttons (each of equal size, so the same size as the worst case length of translated text) and there isn't sufficient space on a small screen to fit them all in.

It might be possible to fix this with judicious use of line breaks, assuming whatever's providing these button widgets allows line breaks in button labels. Or perhaps the translations could be trimmed. Otherwise I think you'd need to split the row of buttons into two if it wasn't going to fit all in one row.