Cluster Manager slow or unresponsible with high segment count tables

I am experiencing an issue where the Cluster Manager with a single table cluster hosting 27 000 segments.

UI is not broken but very slow and sometime even unresponsive. With enough patience, most administration task works.

A suggestion would be to lazy load segment and use a paging iterator rather than loading all information in the browser.

Start at the Cluster Manager UI with a reproduction using a table containing 27,000 segments, then measure the slow administration views in the browser. Done means the UI remains responsive and administration tasks work without loading all segment information at once.

Written by the indexing model from the issue text.