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/de_DE.ISO8859-1/config/sys.dtwmrc.tmsg

@@ -142,6 +142,10 @@ $ *--------------------------------------------------------------------------*
     \"Symbolgröße\"\t_S\tAlt<Key>F9\tf.minimize\n\
     \"Maximale Größe\"\t_M\tAlt<Key>F10\tf.maximize\n\
     \"Nach hinten\"\t_u\tAlt<Key>F3\tf.lower\n\
+     no-label\t\t\t\t\t\tf.separator\n\
+    \"Arbeitsbereich belegen...\"\t_b\t\t\tf.workspace_presence\n\
+    \"Alle Arbeitsbereiche belegen\"\t_A\t\t\tf.occupy_all\n\
+    \"Aus Arbeitsbereich entfernen\"\t_e\t\t\tf.remove\n\
     no-label\t\t\t\tf.separator\n\
     \"Schließen\"\t_c\tAlt<Key>F4\tf.kill"
 $ *