Workspace guests remain visible in the guest list after removing the last board

Issue Summary

When removing the last board from the workspace guest list, the member remains visible in the list until the screen is refreshed

Steps to Reproduce

Prerequisite:  a workspace with a multi-board or single-board guest

1. Go to https://trello.com/w/[workspacename]/members/guests 
2. Select "On X Boards"  > "Remove" to remove the boards

Expected Results

Workspace guest is removed from the guest list after the final board is removed

Actual Results

page must be refreshed to remove the guest from the list 

Workaround

refresh the page