[ui] Handle grouping bugs, when groupings with only one item are not given a grouping header ; do minimal corrections to be able to submit a job ; might be able to deploy an environment with this version

[development] document the possibility of getting the current user from environment if header not defined to help with development

[development] add possibility of getting the current user from environment if header not defined to help with development

Handle cases in quick-start where grouping compacted away pieces of hierarchy because only one node conforms to query. Move code that could be put in common with node.js in exhibit

Change size of FiberPool because when adding em_postgres, a size of 4 is no longer big enough to support running the ui on the development server