3.8.0
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* Address major memory leak when changing backgrounds [Ray; #696157]

Contributors:
  Ray Strode

Translations:
  Sandeep Sheshrao Shedmake [mr], Victor Ibragimov [tg], Gabor Kelemen [hu],
  Ville-Pekka Vainio [fi], Rajesh Ranjan [hi], Dr.T.Vasudevan [ta],
  ManojKumar Giri [or], Yuri Myasoedov [ru], Petr Kovar [cs],
  Jiro Matsuzawa [ja], Krishnababu Krothapalli [te], Ani Peter [ml],
  Inaki Larranaga Murgoitio [eu]