Merge branch 'develop' into 'production'

src/api/tests/schedule.py

src/api/views/schedule.py

src/plainui/jinja2/plainui/assemblies.html

src/plainui/jinja2/plainui/component_gallery.html

src/plainui/jinja2/plainui/header.html

src/plainui/jinja2/plainui/login.html

src/plainui/jinja2/plainui/signup.html

src/plainui/styles/components/_header.scss

src/plainui/styles/hub.scss

src/plainui/styles/variables/_colors.scss

src/plainui/styles/variables/_fonts.scss

src/plainui/views.py