Add View.enable_all_items

[Ombucha]

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, typehinting, examples, ...)

[codecov]

Codecov Report

Merging #1319 (4b5a2e0) into master (ea6f59d) will decrease coverage by 0.00%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##           master    #1319      +/-   ##
==========================================
- Coverage   33.42%   33.42%   -0.01%     
==========================================
  Files          93       93              
  Lines       17606    17610       +4     
==========================================
+ Hits         5885     5886       +1     
- Misses      11721    11724       +3     

Flag	Coverage Δ
pytest	33.42% <25.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
discord/ui/view.py	25.00% <25.00%> (ø)

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