Having only one submission type shows all submission types

[glasnt]

Current Behavior

If an event only uses one submission type, the submission form shows submission types for ALL events

Expected Behavior

Only submission types for the current conference should populate the dropdown.
Added bonus: if only one, the field should be read-only/text.

Steps to Reproduce

1. https://pretalx.com/orga/event/[YOUREVENT]/cfp/types/
2. Enter only one type
3. Navigate to https://pretalx.com/[YOUREVENT]/submit/
4. Click the dropdown for "Submission type"

Work around

Enter more than one submission type.

Your Environment

Pretalx hosted environment

[rixx]

Oops. That's what you get for trying to be clever and make a special case for "one submission type, no point of showing the field"! Thank you, @luto, for the timely fix.

[rixx]

The fix has been deployed on pretalx.com, too, so you should be good on that side, @glasnt.