tagging specific version of a notebook
changed default tag value
artifacts
fixes for tagged versions

rename add_history_nodes update_* and add update nodes step
add option wither==='same' to just refresh without adding more

improve legibility of tag_notebook by using a local variable
don't reload the notebook
return the promise
Merge branch 'feature/tagged-versions' into develop

Conflicts:
	htdocs/js/rcloud_bundle.min.js