If you create filters with long names, then the "Severity", "Resolution" and "Profile" columns get very wide, while the "Reporter", "Modified By", "Assigned To" and "Category" columns get squished. This is because the bottom row in the "Filters" table (with the white background) is divided based on the columns above (using colspan), rather than being its own nested table.

Having that last row be a full-width nested table would allow it to allocate its screen width for best appearance, while the filter entries above could separately allocate their width for their best appearance.