Move pane container saveAll specs to model layer

spec/pane-container-spec.coffee

@@ -249,3 +249,19 @@ describe "PaneContainer", ->
         ['will', {item: item2, pane: pane2, index: 0}]
         ['did', {item: item2, pane: pane2, index: 0}]
       ]
+
+  describe "::saveAll()", ->
+    it "saves all open pane items", ->
+      container = new PaneContainer
+      pane1 = container.getRoot()
+      pane2 = pane1.splitRight()
+
+      pane1.addItem(item1 = {getURI: (-> ''), save: -> @saved = true})
+      pane1.addItem(item2 = {getURI: (-> ''), save: -> @saved = true})
+      pane2.addItem(item3 = {getURI: (-> ''), save: -> @saved = true})
+
+      container.saveAll()
+
+      expect(item1.saved).toBe true
+      expect(item2.saved).toBe true
+      expect(item3.saved).toBe true

spec/pane-container-view-spec.coffee

@@ -64,16 +64,6 @@ describe "PaneContainerView", ->
       pane4.splitDown()
       expect(panes).toEqual []
 
-  describe ".saveAll()", ->
-    it "saves all open pane items", ->
-      pane1.activateItem(new TestView('4'))
-
-      container.saveAll()
-
-      for pane in container.getPaneViews()
-        for item in pane.getItems()
-          expect(item.saved).toBeTruthy()
-
   describe "pane-container:active-pane-item-changed", ->
     [pane1, item1a, item1b, item2a, item2b, item3a, container, activeItemChangedHandler] = []
     beforeEach ->