LinkDialog Editor Plugin Does Not Destory Constituents

[ptwobrussell]

The LinkDialog? plugin creates a TooltipDialog? but never explicitly disposes of it. A patch like this one may do the trick:

  uninitialize: function() {
      this.inherited(arguments);
      this.dropDown.destroyRecursive();  }                                                                     

See also #8106

[bill]

(In [15988]) Fix leak where drop down wasn't being destroyed. Fixes #8106, #8107 !strict.