Add a warning when a user is to leave the gradebook with unsaved grades

[JonasKarlén]

When a teacher sets grades in the Canvas Gradebook, they are saved when the "grade field" stops being active. This can be done, by the teacher clicking with her/his mouse anywhere inside the window, including on a link. If the teacher however clicks on the browser button for going backwards or refreshing the page, the grade in an active "grade field" is not saved.

My idea is that a teacher who is about to leave the Gradebook with unsaved grades, should get a warning in a dialogue box, as it is on other pages in Canvas.

[ProductPanda]

Comments from Instructure

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