Single room mode should completely hide left panel column

[ashfame]

When the container width is wide enough, the left panel shows up even when single room mode is configured. IMO, it should be completely hidden and any screen that needs to be accessible (if there is one? settings? not sure) should be accessible from right side of the title line, where usually room options button exist.

[ashfame]

This doesn't seem to happen as of now (when embedded in iframe & container size is increased), perhaps its only an issue with the unknownRoom view or peeking related branches.