I had never thought to click on the button on the RHS here to display the space index - i assumed it would always show me the server's room directory.

• Can we change the tooltip to 'Explore space' or 'Explore Element Corp.' rather than 'Explore rooms', which sounds like it's talking about the old roomdir?
• Is there a better icon which makes it clearer that we're talking about spaces here?

Precisely the same goes for the bottom at the bottom of the roomlist:

If these apply to the current space, should it be "Invite to Element Corp." and "Explore Element Corp."?