"Squash commits" option and "Squash commit message" aren't stored for merge requests
I just realized that the state of the "Squash commits" checkbox and the text entered into the resulting "Squash commit message" input are not saved for merge requests.
I think this worked before, so this might be a regression. Potentially it also depends on state (maybe it only works when "merge when pipeline uscceds" is activated?).
Steps to reproduce
Visit a merge request
enable "Squash commits" checkbox and add some text in the "Squash commit message" input
Now reload the page
Observed at inkscape/inkscape!811 (merged)
What is the current bug behavior?
State of checkbox and content of text input not saved
What is the expected correct behavior?
The state of the checkbox and the content of the text input should be saved.
This would allow a workflow, where a project maintainer sets the flags as desired and modifies the commit message as needed as a step of the review process.
Current behavior forces maintainers to do all that when merging the MR. Also it requires a little ridiculous review comments like "looks good if minor issue X is fixed; should only be merged squashed and after changing commit message to ..."