treecolgroups and treecols didn't quite have the right rules. Fixing.

xpfe/global/resources/content/MANIFEST

@@ -19,5 +19,7 @@ wizardHandlerSet.js
 wizardManager.js
 wizardOverlay.js
 wizardOverlay.xul
+treePopups.js
+
 
 

xpfe/global/resources/content/Makefile.in

@@ -50,6 +50,7 @@ EXPORT_RESOURCE_CONTENT = \
     $(srcdir)/wizardManager.js \
     $(srcdir)/wizardOverlay.js \
     $(srcdir)/wizardOverlay.xul \
+	$(srcdir)/treePopups.js \
 		$(NULL)
 
 include $(topsrcdir)/config/rules.mk

xpfe/global/resources/content/makefile.win

@@ -49,6 +49,7 @@ install::
   $(MAKE_INSTALL) wizardManager.js $(DISTBROWSER)
   $(MAKE_INSTALL) wizardOverlay.js $(DISTBROWSER)
   $(MAKE_INSTALL) wizardOverlay.xul $(DISTBROWSER)
+  $(MAKE_INSTALL) treePopups.js $(DISTBROWSER)
   
 clobber::
   rm -f $(DIST)\bin\chrome\global\content\default\*.*

xpfe/global/resources/skin/global.css

@@ -917,6 +917,10 @@ tree {
   width: 100%;
 }
 
+treecol[hidden="true"] {
+  visibility: collapse;
+}
+ 
 /* BEN: making dialog trees nicely inset */
 tree.inset {
   border: 1px inset white;

xpfe/global/resources/skin/xul.css

@@ -190,6 +190,10 @@ treecol {
  display: table-column;
 }
 
+treecolgroup {
+  display: table-column-group;
+}
+
 /********** Tab widget *********/
 
 tab {