"Remove" nomenclature refinement and Files View context menu rejigger.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java	(revision 5047)
+++ editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/filesview/FilesView.java	(working copy)
@@ -19,6 +19,7 @@
 import com.google.dart.tools.ui.actions.CopyFilePathAction;
 import com.google.dart.tools.ui.actions.DeleteAction;
 import com.google.dart.tools.ui.internal.actions.CollapseAllAction;
+import com.google.dart.tools.ui.internal.handlers.OpenFolderHandler;
 import com.google.dart.tools.ui.internal.preferences.DartBasePreferencePage;
 import com.google.dart.tools.ui.internal.projects.CreateFileWizard;
 import com.google.dart.tools.ui.internal.projects.CreateFolderWizard;
@@ -291,30 +292,43 @@
     manager.add(createFileAction);
     manager.add(createFolderAction);
 
-    // Rename... / Move..., iff single element and is an IResource
+    // OPEN GROUP
 
+    manager.add(new Separator());
+    manager.add(OpenFolderHandler.createCommandAction(getSite().getWorkbenchWindow()));
+
     IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection();
-    Object element = selection.getFirstElement();
-    if (selection.size() == 1 && element instanceof IResource) {
+
+    // REFACTOR GROUP
+
+    // Refactor iff all elements are IResources
+
+    if (!selection.isEmpty() && allElementsAreResources(selection)) {
       manager.add(new Separator());
-      manager.add(renameAction);
-      manager.add(moveAction);
+      if (selection.size() == 1) {
+        manager.add(renameAction);
+        manager.add(moveAction);
+      }
+      manager.add(deleteAction);
     }
 
-    // Delete, iff non-empty selection, all elements are IResources
+    // Remove, iff non-empty selection, all elements are IResources
 
     if (!selection.isEmpty() && allElementsAreResources(selection)) {
+
+      // Copy File Path iff single element and is an IResource
+
+      if (selection.size() == 1) {
+        manager.add(new Separator());
+        manager.add(copyFilePathAction);
+      }
+
       manager.add(new Separator());
       if (allElementsAreProjects(selection)) {
         manager.add(hideContainerAction);
       }
-      manager.add(deleteAction);
     }
 
-    // Copy File Path
-
-    manager.add(new Separator());
-    manager.add(copyFilePathAction);
   }
 
   protected void fillInToolbar(IToolBarManager toolbar) {