Find-broadcast: Show create new broadcast form if less than 6 broadcasts in result set

[roschaefer]

• I'm submitting a ...

  • feature request

• What is the current behavior?
  If you search for sth. like "Rote Rosen" with just one result (currently two) you know there are no more broadcasts (by default maximal 6 results). https://rundfunk-mitbestimmen.de/find-broadcasts?q=Rote%20Rosen

• What is the expected behavior?
  It would be great to show a "Create new broadcasts" button in the result set. So, people don't have to click on "Next" to see the form.

• What is the motivation / use case for changing the behavior?
  Encourage users to create broadcasts.

• If you want to request a whole new feature, please provide a user story (otherwise delete):

  • As a user
  • I want to see a button to create a new broadcast when the search returned less than 6 results
  • So that I learn that I can create broadcasts

Thanks @jochenklar

[roschaefer]

duplicate #863