Empty room directory leads to awkward messaging

[turt2live]

Steps to reproduce

1. Set up a brand new server
2. Create an account
3. Open the room directory (without ever creating or publishing a room)

Outcome

What did you expect?

Some sort of generic "there be nothing" message

What happened instead?

A slightly awkward version of what was expected:

Operating system

Windows 10

Browser information

Chrome

URL for webapp

private

Homeserver

private

Will you send logs?

No

[germain-gg]

Could someone from product add the expected copy.
Once done, we should be able to assign the "good first issue" here, as it is a relatively scoped problem to solve

[t3chguy]

Even worse on Spotlight