Add EditorManager.getEditor() and currentEditor
Merge remote-tracking branch 'upstream/master' into cde-polymer-designer
Switch editor on "Edit in Polymer Designer" + save changed code to editor i/o file

In principle, saving to file should work now, too, in terms of preserving the undo stack, after TextEditor.replaceContents() has been fixed. However, saving to editor displays the changes faster.
Change action category for "Edit in Polymer Designer"
Add access to Polymer Designer via in-editor button
Merge pull request #3627 from ussuri/cde-polymer-designer

Polymer Designer: access via in-editor button