Avoid hitting the SettingsStore thousands of times when generating room lists
Avoid hitting the SettingsStore thousands of times when generating room lists

Should fix https://github.com/vector-im/riot-web/issues/7646 to some degree
matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk