Ensure only Device Palette settings sent when changed

[hardillb]

fixes #7166

Description

When saving the palette changes the component was requesting the whole settings object and only updating the npmrc file and the catalogues, but this also included the sanitised security settings which includes pass: true to show if a password is set, but not it's value (or hashed value). This needed to be removed before it is returned.

Related Issue(s)

#7166

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.59%. Comparing base (424fbb5) to head (5d1a7f8).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7175      +/-   ##
==========================================
- Coverage   76.61%   76.59%   -0.02%     
==========================================
  Files         405      405              
  Lines       20427    20427              
  Branches     4925     4925              
==========================================
- Hits        15650    15646       -4     
- Misses       4777     4781       +4     

Flag	Coverage Δ
backend	76.59% <ø> (-0.02%)	⬇️

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