Fix: Ensure EditUserModal can't be closed until the crop is finished or canceled

[Nostromos]

Fixes #896 and very similar to #911.

[ddfridley]

@Nostromos to fix the issue you are working on, is it necessary to make these changes? Changing the version of python impacts the whole system, and would require more extensive QA testing before release. As for the @flow changes, same question, but I don't know @flow and if effects run time, or just build time. I know these seem like simple changes, but this is a product in production and we need to be very careful about changes. QA testing and releasing to production is a big task, we want to make the changes as focused as possible. Thanks!

[Nostromos]

Hey @ddfridley - Thanks for the engagement! FYI this is still a draft so not ready to review yet. Childcare fell through today so halfway through my commits had to stop and go home. As far as your comment...

Changing the version of python impacts the whole system, and would require more extensive QA testing before release

This only changes the python version for the pre-commit package config, not python for the whole system. I could not get working otherwise and pre-commit is required to commit anything. I plan to remove this commit before marking this PR ready for review. I'll take some time after to figure out why pre-commit isn't recognizing my python 3.8 install.

As for the @flow changes, same question, but I don't know @flow and if effects run time, or just build time. I know these
seem like simple changes, but this is a product in production and we need to be very careful about changes. QA testing and releasing to production is a big task, we want to make the changes as focused as possible.

We're aligned. These flow changes shouldn't affect run or build time as far as I can tell. Reviewing my own builds doesn't show any change.

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I'm being really careful not to change more than necessary and to keep the fix in scope. I'm also referring to the other PR submitted for this issue and getting ahead of the issues raised there. Honestly, that fix looked good but I need the practice and its good exposure to the codebase for me.

tl;dr Check back when this PR is out of draft.

[Nostromos]

Update: My wife and I managed to find childcare so I should be back at this tomorrow. Major apologies for the delay but kiddo is really little so its non-stop.

[ddfridley]

@Nostromos Sorry for the slow responses. I'm back from vacation and so is Marlon. How is it going?