change external editor icon (#3770)

src/collective/dms/basecontent/browser/column.py

@@ -148,7 +148,7 @@ class ExternalEditColumn(IconColumn, LinkColumn):
     header = u""
     weight = 3
     linkName = "@@external_edit"
-    iconName = "extedit_icon.png"
+    iconName = "++resource++extedit_icon.png"
     linkContent = PMF(u"Edit with external application")
 
     def actionAvailable(self, item):

src/collective/dms/basecontent/browser/configure.zcml

@@ -18,6 +18,11 @@
       image="static/img/dmsdocument_icon.png"
       />
 
+  <browser:resource
+      name="extedit_icon.png"
+      image="static/img/extedit_icon.png"
+      />
+
   <browser:page
       for="collective.dms.basecontent.dmsdocument.IDmsDocument"
       name="view"