3.9.91
======

GTK3:
  Improve support for headerbars styling (Allan Day, Paolo Borelli,
  Jakub Steiner)
  Increase legibility of pushed button style (Allan Day)
  Fix CSD shadows for dark themed windows (Matthias Clasen)
  Fix dim-label color on selected rows (Thomas Wood)
  Fix font style for context menus (Matthias Clasen)
  Fixes for destructive/suggested-action buttons (Andreas Nilsson)
  App specific fixes for Baobab, Nautilus (Stefano Facchini, António Fernandes)

HighContrast:
  Add support for CSD and headerbars
  Fix insensitive menu items styling
  Fix extra frame for GtkStatusbar
  App specific fixes for Nautilus