Merge branch '21077-background-refresh' refs #21077

Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz@curii.com>

diff --cc src/index.tsx
Simple merge

diff --cc src/store/data-explorer/data-explorer-middleware-service.ts
Simple merge

diff --cc src/store/project-panel/project-panel-middleware-service.ts
Simple merge

diff --cc src/store/users/user-panel-middleware-service.ts
Simple merge