[experiments] Algorithm picker misses a refresh functionality
When the user is configuring an experiment, it is not obvious that, if a block cannot be filled, they would need to create a new algorithm matching endpoint criteria.
It would be good to:
- If no algorithms match, then a button for creating a new algorithm is displayed to the right. It would be an extra feature if the algorithm new page is already displayed with the correct endpoint names.
- If the user is, after creating the algorithm, able to refresh the available algorithm list.
- In the case no algorithm is selected on the dropdown, make sure the word
nullis not displayed (this is actually a display bug).