This ticket could cover item 3 and 6 raised in IRSA-1554:

... for item 6 we will add "/properties" to the end of every URL, change the title from "URL" to "HiPS Properties", and make the cell value easily selectable for a "Copy" or "Open Address in New Tab/Window" operation says that there is prior art for this in other Firefly table viewers), so that it is easier for the user to follow the link. For item 3, we will make the column wider to accommodate these (longer) URLs. (Apparently it is not easy to make the URL clickable or to replace the URL with clickable text or an icon.

Based on above decision about the expectation from the UI, we could add a column with a link to those properties if time permit, otherwise, add column with properties URL and hide the original one.

per discussion with Trey Roby regarding HiPS list UI, instead of creating methods for app to configure the list containing popular HiPS data, here is the modification, 

• Create a method to let the application to configure the available HiPS sources and HiPS sources selection for the creation of HiPS list. 
• For the application, two app option parameters are provided,   
  • hips.hipsSources:  available HiPS sources where HiPS list can be created from. ex:  'cds,irsa', 'all', etc. If not specified, all available HiPS sources are assumed. 
  • hips.defHipsSources:  default HiPS sources selected from the available HiPS sources.  if not specified, the first item from the available HiPS sources is assumed. 
• For UI, checkboxes are used to present the available HiPS sources and selected ones. 

Per proposal on HiPS map list,  https://jira.lsstcorp.org/browse/DM-13855

the following columns are included in the HiPS-selection list for current PR, https://github.com/Caltech-IPAC/firefly/pull/569, 

• obs_title (text, field needs to be fairly wide)
• obs_regime (text, a single word)
• hips_release_date (an ISO-8601 date)
• hips_frame (text, a single word)
• hips_order (a one or two digit integer)
• hips_pixel_scale (if available; a float in units of degrees)
• moc_sky_fraction (a floating point number, dimensionless)

For collecting the values for the above keywords, HiPS list services from various HiPS server is called first, and further HiPS properties services (<hips_service_url>/properties)  is called in case any of the above keyword is missing from the first call. 

For  HiPS of non image type (cube, catalog), the fields would be considered to be updated and presented by some UI elements in the future.