Move model overview CTA and update title

[steverydz]

Done

• Moved the CTA on model overview to the top of the view
• Added a breadcrumb navigation
• Hide h1 except for screen readers

How to QA

• Go to https://snapcraft-io-4373.demos.haus/admin/njwQYXFnS7ppo7LaGxoh7aqVZc1CPi26/models/aliomt-test-model-no-api-key1
• Check that the CTA is at the top of the form
• Check that there is a breadcrumb navigation
• Check that the h1 is not visible

Issue / Card

Fixes https://warthogs.atlassian.net/browse/WD-5631

[webteam-app]

Demo starting at https://snapcraft-io-4373.demos.haus

[codecov]

Codecov Report

Merging #4373 (a7823c6) into main (27e8b75) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head a7823c6 differs from pull request most recent head bb13f16. Consider uploading reports for the commit bb13f16 to get more accurate results

@@           Coverage Diff           @@
##             main    #4373   +/-   ##
=======================================
  Coverage   80.32%   80.33%           
=======================================
  Files         205      206    +1     
  Lines       10273    10276    +3     
  Branches      901      901           
=======================================
+ Hits         8252     8255    +3     
  Misses       1899     1899           
  Partials      122      122           

Flag	Coverage Δ
javascript	69.48% <100.00%> (+0.02%)	⬆️
python	85.82% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...tatic/js/brand-store/components/Model/ModelNav.tsx	100.00% <ø> (ø)
...tatic/js/brand-store/components/Model/Policies.tsx	69.76% <ø> (ø)
...s/brand-store/components/SectionNav/SectionNav.tsx	100.00% <ø> (ø)
static/js/brand-store/components/Model/Model.tsx	49.15% <100.00%> (ø)
...s/brand-store/components/Model/ModelBreadcrumb.tsx	100.00% <100.00%> (ø)

[Lukewh]

For some reason I see a li dot in the nav:

And when you go to the policies tab you lose the breadcrumb:

[julpal7]

@steverydz I agree with Luke on the breadcrumb (however, there is no dot in my preview). Secondly, could you please move the first text line up to align with the text on CTAs? Thanks in advance!

[Lukewh]

👍 LGTM

[julpal7]

Everything looks good, thanks Steve