Minor bug fix

[citizenmatt]

This PR fixes the following issues:

• [x] Fix exception in Commit prefs page for default project - DEXP-671465
• [x] Fix occasional invalid source file exception - DEXP-672670
• [x] Fix incorrect redundant warning about [field: SerializeField] on auto-property - RIDER-77782, #2319
• [x] Fix registry packages being added as references to .asmdef file - RIDER-79306
• [x] Update toggle items in Unity toolbar drop down to follow UI guidelines (static text + check mark rather than dynamically setting "Show"/"Hide")
• [x] Add external annotations to mark Mathf as Pure. Adds inspection to ensure using return value of Mathf methods.
• [x] Update API information to 2022.2.0a17

[citizenmatt]

Merged by TeamCity