Fix the custom tag panel
Fix the custom tag panel

https://github.com/matrix-org/matrix-react-sdk/pull/2780 renamed
RoomTooltip (to Tooltip) but missed the references in the custom
tag panel.

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