4.0.0-alpha.20

Added

• Added translations to Portuguese @emansije

Changes

• Fix wysiwyg widget help tag, for styling consistency @tiberiuichim
• Added more i18n improvements @macagua
• Disable submit button on save, to avoid multiple content creation @tiberiuichim
• Fix focus on sidebar @robgietema

Internal

• Upgrade version pin for lxml, for compatibility with Python3.8
• Bump handlebars from 4.1.2 to 4.3.0 @timo