Don't ask for team again if we already have a child window.

app/templates/editor/level/edit.jade

@@ -49,7 +49,7 @@ block header
         
         if level.get('type') === 'ladder'
           li.dropdown
-            a(data-toggle='dropdown')
+            a(data-toggle='dropdown').play-with-team-parent
               span.glyphicon-play.glyphicon
             ul.dropdown-menu
               li.dropdown-header Play As Which Team?

app/views/editor/level/edit.coffee

@@ -26,6 +26,7 @@ module.exports = class EditorLevelView extends View
   events:
     'click #play-button': 'onPlayLevel'
     'click .play-with-team-button': 'onPlayLevel'
+    'click .play-with-team-parent': 'onPlayLevelTeamSelect'
     'click #commit-level-start-button': 'startCommittingLevel'
     'click #fork-level-start-button': 'startForkingLevel'
     'click #level-history-button': 'showVersionHistory'
@@ -77,6 +78,12 @@ module.exports = class EditorLevelView extends View
     @listenTo @patchesView, 'accepted-patch', -> location.reload()
     @$el.find('#level-watch-button').find('> span').toggleClass('secret') if @level.watching()
 
+  onPlayLevelTeamSelect: (e) ->
+    if @childWindow and not @childWindow.closed
+      # We already have a child window open, so we don't need to ask for a team; we'll use its existing team.
+      e.stopImmediatePropagation()
+      @onPlayLevel e
+
   onPlayLevel: (e) ->
     team = $(e.target).data('team')
     sendLevel = =>