fix: form footer buttons in the wrong place

[adrianthedev]

Description

Fixes #1067

This will add the buttons only on the panel with the root fields. If all fields are tucked in tabs, it won't display the buttons in the right place.
More work is needed for that to happen (help is much appreciated).

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

Screenshots

[codeclimate]

Code Climate has analyzed commit c4d5cf7 and detected 0 issues on this pull request.

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[codecov]

Codecov Report

Merging #1071 (c4d5cf7) into main (aadc168) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1071      +/-   ##
==========================================
- Coverage   93.91%   93.88%   -0.04%     
==========================================
  Files         519      519              
  Lines       10164    10149      -15     
==========================================
- Hits         9546     9528      -18     
- Misses        618      621       +3     

Impacted Files	Coverage Δ
app/components/avo/panel_component.rb	100.00% <ø> (+3.03%)	⬆️
...pp/components/avo/views/resource_edit_component.rb	96.96% <ø> (-0.09%)	⬇️
...pp/components/avo/views/resource_show_component.rb	96.42% <ø> (-0.13%)	⬇️
app/components/avo/item_switcher_component.rb	100.00% <100.00%> (ø)
app/components/avo/resource_component.rb	92.50% <100.00%> (-1.74%)	⬇️
spec/system/avo/tabs_spec.rb	100.00% <100.00%> (ø)
lib/avo/concerns/has_fields.rb	74.10% <0.00%> (-3.60%)	⬇️
app/controllers/avo/base_controller.rb	93.33% <0.00%> (-0.04%)	⬇️
spec/system/avo/default_field_spec.rb	95.12% <0.00%> (ø)
app/components/avo/sidebar/link_component.rb	100.00% <0.00%> (ø)
... and 1 more

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[github-actions]

This PR has been merged into main. The functionality will be available in the next release.

Please check the release guide for more information.