Current behavior: As there is no fixed width font used, despite the use of 3.0f in 'label = (property == '_output' ? _("Output: %3.0f%%") : _("Input: %3.0f%%")).format(this[property].volume / VOLUME_MAX * 100)' in volume.js, the label and the volume indicator change their size, and the indicator and can even expand past the screen when the volume is changed while the indicator is showing.

Expected behavior: The volume indicator should always show with the maximum width needed to fit all possible percentage strings.