• Added python 3.9 and django 3.2 to CI.
• Added FileExtensionValidator to logo and favicon fields. #112
• Fixed models.W042 warning on django 3.2.
• Fixed header min-height.
• Fixed selects min-width.
• Fixed changelist search, actions and submit button horizontal margins.
• Fixed related widget wrapper margin/padding with normal select and in inlines.
• Fixed tabular inlines horizontal scroll.