fix, cesyms disabled for non-D docs

src/ce_symlist.lfm

@@ -24,7 +24,7 @@ inherited CESymbolListWidget: TCESymbolListWidget
         Width = 302
         Align = alClient
         BorderSpacing.Around = 4
-        DefaultItemHeight = 18
+        DefaultItemHeight = 16
         HideSelection = False
         Images = imgList
         ReadOnly = True

src/ce_symlist.pas

@@ -632,6 +632,7 @@ var
 begin
   if fDoc = nil then exit;
   if fDoc.Lines.Count = 0 then exit;
+  if not fDoc.isDSource then exit;
 
   // standard process options
   killProcess(fToolProc);