Preserve focus state of command panel's mini-editor on refresh

spec/extensions/command-panel-spec.coffee

@@ -18,16 +18,29 @@ describe "CommandPanel", ->
     rootView.deactivate()
 
   describe "serialization", ->
-    it "preserves the command panel's mini editor text and visibility across reloads", ->
+    it "preserves the command panel's mini-editor text, visibility, and focus across reloads", ->
+      rootView.attachToDom()
       rootView.trigger 'command-panel:toggle'
+      expect(commandPanel.miniEditor.isFocused).toBeTruthy()
       commandPanel.miniEditor.insertText 'abc'
-      newRootView = RootView.deserialize(rootView.serialize())
+      rootView2 = RootView.deserialize(rootView.serialize())
+      rootView.deactivate()
+      rootView2.attachToDom()
 
-      commandPanel = newRootView.activateExtension(CommandPanel)
-      expect(newRootView.find('.command-panel')).toExist()
+      commandPanel = rootView2.activateExtension(CommandPanel)
+      expect(rootView2.find('.command-panel')).toExist()
       expect(commandPanel.miniEditor.getText()).toBe 'abc'
+      expect(commandPanel.miniEditor.isFocused).toBeTruthy()
 
-      newRootView.remove()
+      rootView2.focus()
+      expect(commandPanel.miniEditor.isFocused).toBeFalsy()
+      rootView3 = RootView.deserialize(rootView2.serialize())
+      rootView2.deactivate()
+      rootView3.attachToDom()
+      commandPanel = rootView3.activateExtension(CommandPanel)
+
+      expect(commandPanel.miniEditor.isFocused).toBeFalsy()
+      rootView3.deactivate()
 
   describe "when command-panel:close is triggered on the command panel", ->
     it "detaches the command panel", ->

src/extensions/command-panel/command-panel.coffee

@@ -23,10 +23,12 @@ class CommandPanel extends View
   @serialize: ->
     text: @instance.miniEditor.getText()
     visible: @instance.hasParent()
+    miniEditorFocused: @instance.miniEditor.isFocused
 
   @deserialize: (state, rootView) ->
     commandPanel = new CommandPanel(rootView)
-    commandPanel.attach(state.text) if state.visible
+    commandPanel.attach(state.text, focus: false) if state.visible
+    commandPanel.miniEditor.focus() if state.miniEditorFocused
     commandPanel
 
   @content: (rootView) ->
@@ -85,9 +87,10 @@ class CommandPanel extends View
       else
         @miniEditor.focus()
 
-  attach: (text='') ->
+  attach: (text='', options={}) ->
+    focus = options.focus ? true
     @rootView.vertical.append(this)
-    @miniEditor.focus()
+    @miniEditor.focus() if focus
     @miniEditor.setText(text)
     @miniEditor.setCursorBufferPosition([0, Infinity])