Call adjustSplitPanes after setting window state

src/app/root-view.coffee

@@ -90,9 +90,11 @@ class RootView extends View
         @getWindowState($(elt))
 
   setWindowState: (windowState, parent) ->
+    adjustSplitPanes = false
     unless parent
       @panes.empty()
       @editors = []
+      adjustSplitPanes = true
       parent = @panes
 
     switch windowState.shift()
@@ -111,6 +113,8 @@ class RootView extends View
         for child in windowState
           @setWindowState(child, column)
 
+    @adjustSplitPanes() if adjustSplitPanes
+
   addPane: (view, sibling, axis, side) ->
     unless sibling.parent().hasClass(axis)
       container = $$ -> @div class: axis