Issue Summary

Changing branches while in source edit view can lead to commit dialog not rendering on firefox. This issue will lead to loss of work for users.

Steps to Reproduce

1. Open a repo with at least two branches

1. From the Source view, on the main branch, select a file (such as a readme file), then select Edit.

1. Use the branch selector to change branch.

1. Make edits

1. Click Commit.

Expected Results

Commit message dialog is displayed

Actual Results

No dialog, page input blocked page, header missing. The textarea from the dialog is in the bottom left of the screenshot

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available