💄 [#2081] add profile-edit page designs

[jiromaykin]

issue https://taiga.maykinmedia.nl/project/open-inwoner/task/2081
➕ this PR also solves issue: https://taiga.maykinmedia.nl/project/open-inwoner/task/2082
Add back-buttons + add correct icon in My profiel + add new designs for edit-profile and view BRP/digid profile-data.
http://localhost:8000/mijn-profiel/
http://localhost:8000/mijn-profiel/edit/
http://localhost:8000/mijn-profiel/mydata/
➕ added new class for fullwidth buttons in forms

Designs: https://www.figma.com/file/iKGhWhstaLIlFSaND2q7cE/OIP---Designs-(new)?type=design&node-id=3%3A6398&mode=design&t=VNpvkCkb7m5lhpIq-1

Note: we do not have Tablet designs yet for any pages with a sidebar...

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (651f7cd) 94.91% compared to head (f426b20) 94.91%.

❗ Current head f426b20 differs from pull request most recent head 3f29cb5. Consider uploading reports for the commit 3f29cb5 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1008   +/-   ##
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  Coverage    94.91%   94.91%           
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  Files          882      882           
  Lines        30748    30748           
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  Hits         29183    29183           
  Misses        1565     1565           

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[stevenbal]

Looks good, just one question about mobile view for profile edit page

[jiromaykin]

@stevenbal I removed the back-buttons now because the designer has to update the design; apparently those buttons need to become a single breadcrumb that will just show the 'current' page in the breadcrumb view - but for that we would need to further discuss and open a new issue.