Fixed create & edit story views to show users, sprints & epics from the current sprint

[matagus]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 43.75000% with 27 lines in your changes are missing coverage. Please review.

Project coverage is 46.85%. Comparing base (1eadce3) to head (898729f).
Report is 7 commits behind head on main.

Files	Patch %	Lines
matorral/stories/views.py	25.00%	18 Missing ⚠️
matorral/stories/forms.py	62.50%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #116      +/-   ##
==========================================
- Coverage   47.49%   46.85%   -0.64%     
==========================================
  Files          38       36       -2     
  Lines        1217     1272      +55     
==========================================
+ Hits          578      596      +18     
- Misses        639      676      +37     

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