Remove path data attributes when no active item

spec/pane-view-spec.coffee

@@ -128,6 +128,12 @@ describe "PaneView", ->
       it "adds the file name as a data attribute to the pane", ->
         expect(pane).toHaveAttr('data-active-item-name')
 
+      describe "when the activeItem is destroyed", ->
+        it "removes the data attributes", ->
+          pane.destroyItems()
+          expect(pane).not.toHaveAttr('data-active-item-path')
+          expect(pane).not.toHaveAttr('data-active-item-name')
+
     describe "when the new activeItem does not implement ::getPath", ->
       beforeEach ->
         paneModel.activateItem(editor1)

src/pane-element.coffee

@@ -67,6 +67,9 @@ class PaneElement extends HTMLElement
       @classList.remove('active')
 
   activeItemChanged: (item) ->
+    delete @dataset.activeItemName
+    delete @dataset.activeItemPath
+
     return unless item?
 
     hasFocus = @hasFocus()
@@ -75,9 +78,6 @@ class PaneElement extends HTMLElement
     if itemPath = item.getPath?()
       @dataset.activeItemName = path.basename(itemPath)
       @dataset.activeItemPath = itemPath
-    else
-      delete @dataset.activeItemName
-      delete @dataset.activeItemPath
 
     unless @itemViews.contains(itemView)
       @itemViews.appendChild(itemView)