fix: django shortcuts styling

[fsbraun]

This PR reintroduces the styling for django-shortcuts which were deleted with their icons. The icons are not reintroduced and django-shortcuts will use its own icons also with djangocms-admin-style.

Related resources

• 480

[codecov[bot]]

Codecov Report

Merging #481 (5814549) into master (897f535) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #481   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           33        33           
  Branches         3         3           
=========================================
  Hits            33        33           

Impacted Files	Coverage Δ
djangocms_admin_style/__init__.py	100.00% <100.00%> (ø)

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[DmytroLitvinov]

Waiting for new release :)

[fsbraun]

@marksweb There was a superfluous empty line in setup.py. Removed.

[marksweb]

@fsbraun that explains how I looked over it 😂

[fsbraun]

@DmytroLitvinov Please check pypi.

[DmytroLitvinov]

Thank you, guys 🙌