Portal Admins page width doesn't respect viewport

As shown in below screenshots, the table would looks much better if it respect the viewport and responsive to it.


Start from the Portal Admins page shown in the linked screenshot and reproduce the layout at different viewport widths. Identify the page and table entry points by searching for the Portal Admins text, then verify that the table fits or responds correctly across the affected viewports.

Written by the indexing model from the issue text.