Debug with Alberto: Re-introduced user:pass in pages. Modified fillheader as per new Andrea's devices.cam.all. Loguru in UTC. Embedded ob editor sub-pages. Regression: delete template instance not working anymore.

Handle errors in cabinet connection, and added ASCOM connection button for dome stuff trying to reduce the ASCOM Remote load

Passing on new visualization based on data-attributes. Still id-based: camera-controls, telescope-pointing. Started testing environment stream. Moved js to static/
TODO: human readable status pills, and colors.

Sequencer now have a load_script method allowing to call the template name with params instead of an OB

Next step: pass to data-attributes.
Bug: empty exptime input sometimes.
Regression: ctrl+c on web server doesn't trigger sequencer's KeyboardInterrupt anymore.