dtwm: add missing workspace 'Occupy" commands to the C, de, es, fr, and it locales.

The dtwm DefaultWindowMenu did not list any of the workspace enabled
Occupy commands, which makes it a bit difficult to move windows into a
workspace, or to occupy multiple workspaces.

This was rectified by copying the relevant lines from the
SampleWindowMenu sections containing them that already existed in the
localized files.  Tested on C and DE (German).

cde/programs/localized/fr_FR.ISO8859-1/config/sys.dtwmrc.tmsg

@@ -142,6 +142,10 @@ $ *--------------------------------------------------------------------------*
     \"Réduire\"\t_u\tAlt<Key>F9\tf.minimize\n\
     \"Agrandir\"\t_A\tAlt<Key>F10\tf.maximize\n\
     \"Derrière\"\t_r\tAlt<Key>F3\tf.lower\n\
+     no-label\t\t\t\t\t\tf.separator\n\
+    \"Occuper l'espace de travail...\"\t_O\t\t\tf.workspace_presence\n\
+    \"Occuper tous les espaces de travail\"\t_l\t\t\tf.occupy_all\n\
+    \"Libérer l'espace de travail\"\t_v\t\t\tf.remove\n\
     no-label\t\t\t\tf.separator\n\
     \"Fermer\"\t_F\tAlt<Key>F4\tf.kill"
 $ *