conftypes: Remove quotes for QtFont.

qutebrowser/config/conftypes.py

@@ -703,6 +703,11 @@ class QtFont(Font):
                 font.setPointSizeF(float(size[:-2]))
             elif size.lower().endswith('px'):
                 font.setPointSizeF(int(size[:-2]))
+        # The Qt CSS parser handles " and ' before passing the string to
+        # QFont.setFamily. We could do proper CSS-like parsing here, but since
+        # hopefully nobody will ever have a font with quotes in the family (if
+        # that's even possible), we take a much more naive approach.
+        family = family.replace('"', '').replace("'", '')
         font.setFamily(family)
         return font