- more camViewControls related tweaks
- experimenting with alternative measures ui : now NOT in
a dropdown
- added "toggle" mode to measures-ui2
- updated (wip) annotations system:
 * replaced most "measures" with "annotations"
 * merged measures and annotations for storage & related changes
 * started working on "permanent" storage & display of annotations

- various other tweaks:
 * modified settings etc of camViewControls