* feat(layout): add propagation toggle
Transforms the 'update everyone' button in the layout modal into a
toggle, so that presenter get immediate visual feedback of the current
layout propagation setting when the modal is opened.
* fix: update propagation button locale to 'update to everyone'
* test: update layout test
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Co-authored-by: Anton B <antonbsa.bck@gmail.com>
Add custom layout svgs
If a custom style is set via bbb_custom_style_url or settings.yml,
the svgs applied will be the ones inside the /images/layouts/customStyle/ folder
