Version Number in JSON Schema should be updated when Version Number is changed

[gracepotma]

Replication Steps:

1. Go to an existing form
2. Make some changes
3. Save your changes as a "new version", with a new version number
4. Notice that the version number in the JSON schema did not get updated --> This is especially relevant for forms you are about to save in your config files, because you can easily end up with many different form version numbers, but they are all the same version in the JSON!

Example in dev3 right now: Laboratory Tests version 2.1 was successfully saved as version 2.1, but in the JSON, you can see it is still written as "version 2".

Expected: Whatever version number the user enters in the Save Details Modal should automatically update the "version" tag in the JSON file, when the user clicks "Save" on the modal.

Let me know if this is not clear :)