bulma (call): redesign of call box: - hang up button has be moved next to other action buttons, and is now just an icon with no text, this save room and is coherent with usual A/V calls UIs - actions buttons (mute, desktop sharing, camera switching, hang up) and local video have been redesign to avoid overlapping on small screen. Local video is now a little higher. - remore video border has been suppressed

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