Make v2 default

[rmccar]

What is the context of this PR?

This is to change the version dropdown to default to v2. Just to make things a bit easier for the user.

• Also fixes console error around a null field trying to be set to null
• Tidies up some formatting
• Refactors the show hide css js for some elements to make more sense
• Fixes a bug with the default value for ref_p_start_date and ref_p_end_date not being used

How to review

• Check that v2 is selected now when launcher is loaded
• Check that schemas load as expected when selected from dropdown and using a url

[rmccar]

Make v2 default on launcher

[Yuyuutsu]

Functionally works , tested locally

[katie-gardner]

all for having a default to v2 👍
Do we have any agreed formatting rules for this repo? 😆

[katie-gardner]

Two tiny comments but other than that, looks good 👍

[katie-gardner]

Re-approved following the new changes 👍

[MebinAbraham]

The formatting changes make this hard to review. It should have been separate. Plus formatting rules aren't enforced at the moment, so some else's IDE might be formatting differently. Happy for the formatting changes but it would have been nice if it was in a different PR.

[rmccar]

The formatting changes make this hard to review. It should have been separate. Plus formatting rules aren't enforced at the moment, so some else's IDE might be formatting differently. Happy for the formatting changes but it would have been nice if it was in a different PR.

Yeah you're right. I'm happy to split them out into another PR. Ill do that 👍

[Yuyuutsu]

LGTM !