This is a set of small fixes identified further testing of LTI 1.1 and LTI 1.3 and the migration between them.
- Use the same approach everywhere we need to know whether this is a 1.1 or 1.3 launch.
- Flow breakage in the CKEditor integration due to features added between 12 and 19.
- Typo in OIDC path isoidc -> imsoidc
- window.close link fails does not work after new window opened from ckeditor page returns.