fix: simple editor without solution not loading

[KristinAoki]

This PR resolves the problem editor not load new simple problems and reimplements the changes in #484

Testing

1. Create a new problem
2. Select a problem type
3. Confirm that the editor loads
4. Refresh the page
5. Repeat 2 through 4 until all simple problems have been tested

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 80.32787% with 24 lines in your changes missing coverage. Please review.

Project coverage is 89.01%. Comparing base (dedcb14) to head (f755616). Report is 14 commits behind head on main.

Files	Patch %	Lines
...omponents/SelectionModal/GalleryLoadMoreButton.jsx	16.66%	10 Missing :warning:
...rc/editors/sharedComponents/TinyMceWidget/hooks.js	76.92%	9 Missing :warning:
src/editors/containers/ProblemEditor/index.jsx	50.00%	1 Missing :warning:
src/editors/containers/TextEditor/index.jsx	75.00%	1 Missing :warning:
...ponents/ImageUploadModal/SelectImageModal/hooks.js	85.71%	1 Missing :warning:
...ditors/sharedComponents/SelectionModal/Gallery.jsx	66.66%	1 Missing :warning:
...rc/editors/sharedComponents/TinyMceWidget/utils.js	90.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #489 +/- ## ========================================== - Coverage 89.25% 89.01% -0.24% ========================================== Files 246 248 +2 Lines 4475 4596 +121 Branches 917 961 +44 ========================================== + Hits 3994 4091 +97 - Misses 454 474 +20 - Partials 27 31 +4 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.