fix remaining HS chat bubble issues

[Steve-Mcl]

closes #4502
closes #4488

Description

• fix obscured chat window Chat window on FlowFuse Cloud is obscured #4502
• mitigate kebab menu obscured by bubble on admin pages Some operations are obscured by HS chat bubble widget #4488

Related Issue(s)

#4502
#4488

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

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 78.12%. Comparing base (89c270b) to head (63f5e02).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4504   +/-   ##
=======================================
  Coverage   78.12%   78.12%           
=======================================
  Files         296      296           
  Lines       14125    14125           
  Branches     3189     3189           
=======================================
  Hits        11035    11035           
  Misses       3090     3090           

Flag	Coverage Δ
backend	78.12% <ø> (ø)

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