fix: Updated default component help text

[nkylstad]

Description

The default (fallback) helptext for components referred to the text for the CustomButton component.

• Added the helptext for CustomComponent and used the text from default
• Updated the default text to something more generic.

Related Issue(s)

• Fix help texts #13691 (part 1)

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.57%. Comparing base (f6f6b7e) to head (6f1eee1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13781   +/-   ##
=======================================
  Coverage   94.57%   94.57%           
=======================================
  Files        1623     1623           
  Lines       21798    21798           
  Branches     2570     2570           
=======================================
  Hits        20616    20616           
  Misses        939      939           
  Partials      243      243           

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[wrt95]

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