[WebProfilerBundle] fixed toolbar for IE8 (refs #8380)
Merge branch '2.3'

* 2.3:
  [WebProfilerBundle] fixed toolbar for IE8 (refs #8380)
  [HttpFoundation] removed double-slashes (closes #8388)
  [HttpFoundation] tried to keep the original Request URI as much as possible to avoid different behavior between ::createFromGlobals() and ::create()
  [TwigBridge] fixed form rendering when used in a template with dynamic inheritance