Identifier case

Source commit: 23511ef0a6203429ae021ed199d34b19fbf92d80

source/packages/filemng/DirView.pas

@@ -1820,7 +1820,7 @@ begin
 
     except
       {Capture exceptions generated by the shell}
-      ImageIndex := UnKnownFileIcon;
+      ImageIndex := UnknownFileIcon;
     end;
   end;
 end;
@@ -1870,7 +1870,7 @@ begin
         if IconEmpty then
         begin
           if FileExt = ExeExtension then ImageIndex := DefaultExeIcon
-            else ImageIndex  := UnKnownFileIcon;
+            else ImageIndex  := UnknownFileIcon;
         end;
       end;
       Empty := False;