[new_timepoint] only show null language option when multiple exist

[CamilleBeau]

Brief summary of changes

In this PR, the language drop down for timepoints is only contains a null option when creating a new timepoint if there are more than one languages to choose from in the language table. Otherwise the field automatically selected.

• Have you updated related documentation?

Testing instructions (if applicable)

1. Check that exactly one language exists in the language table
2. Create a new timepoint
3. Make sure that the language drop down does not contain a null option & that you are successfully able to create the timepoint with the one option automatically selected
4. Add a language to the language table to have 2 or more
5. Create another timepoint and make sure that the language drop down is displayed with a null option
6. Check that the language field is required in this case, and that you can not save without it
7. If the language selection is made, make sure that you are able to save the timepoint properly

Link(s) to related issue(s)

• Resolves [Manual testing] - New timepoint #7997

[CamilleBeau]

I am having trouble understanding the errors in the test suite. Everything working fine on front end in my manual tests.

[zaliqarosli]

with only 1 language, the field still displays

[CamilleBeau]

with only 1 language, the field still displays

Sorry Zaliqa, I fixed the PR title & description. The PR was modified so that the field still displays but a null option is only present when multiple languages exist.

[zaliqarosli]

for step 1 "Check that one or less languages exists in the language table", whats the intended functionality if there are 0 languages in the language table?

[CamilleBeau]

for step 1 "Check that one or less languages exists in the language table", whats the intended functionality if there are 0 languages in the language table?

This is a mistake - there should be at least one language. Fixed step 1

[zaliqarosli]

@CamilleBeau okayy looks good! could you add the changes in this PR to the Testplan.md? and then i'll approve!

[CamilleBeau]

@CamilleBeau okayy looks good! could you add the changes in this PR to the Testplan.md? and then i'll approve!

Done!