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

{# display a tag element which can be removed

    if the locale differs from item language, it will be totally reduced, and will need a click to be displayed

    @variable label:
#}
<span class="tag">
    {{label}}
    <button class="delete click_to_delete"></button>
</span>