bulma (call): add a button for screen sharing: - add a button for screen sharing, only on desktop - split `muted` state to `inactive` and `muted` where `muted` is only about the color - use the `inactive` state with an other color (in `screen-off` class) to indicate when screen is not shared rel 432

include MANIFEST.in sat_templates/VERSION
global-include *.py
global-include *.html *.xml
global-include *.css *.js
global-include *.woff *.woff2
global-include *.ini
global-include *.po *.mo
global-include *.txt
global-include CHANGELOG COPYING* INSTALL README*
global-exclude *.un~