minor change: edit label of 'curves' and 'points' interface controls
minor: remove hardcoded length in phaseSweep[] reset
layout adjustments

- use a specific font to ensure identical metrics across browsers
- make the phase slider smaller and place it in the same line as its label
- set vertical-align:middle for all input elements
add interface element to control whether to include ref. wave in hologram or not
minor: fix whitespace