Merge pull request #1755 from ramox81/codex/external-references-close

External References palette: open/close commands, ERSTATE and reference aliases

assets/ocad.pgp

@@ -71,6 +71,9 @@ BE,       *BEDIT
 IAT,      *IMAGEATTACH
 XA,       *XATTACH
 XR,       *XREF
+-XR,      *-XREF
+XC,       *XCLIP
+ICL,      *IMAGECLIP
 ADC,      *ADCENTER
 W,        *WBLOCK