When grading assignments with online text, allow expansion to view all text rather than just open another window.

*Not a duplicate of MDL-33414!

Faculty are reporting that when viewing online text assignments, it would be helpful to have the option of viewing all of the text while in the grading screen. When feedback is turned on, this would allow them to grade and provide feedback while being able to view the student's submission.

1. Create a new 2.3 Assignment, enable Online Text and Feedback Comments
2. Enter a submission and ensure it has at least... 45 words.
3. Enter grading view for the assignment. Note magnifying glass icon to view submission.

Expected: Another option to student submission while remaining in grading view
Reality: Only can open in a new window.