Show plus sign when maximum tracking is reached

[britneywwc]

Done

• Blocked by missing attribute from ua-contracts API
• Hardcoded maxTracking value for now to show "+" in front of active machines number

QA

• Check out this feature branch
• Go to /pro/dashboard
• See "+" in front of active machines number

Issue / Card

Fixes WD-10492

Screenshots

[If relevant, please include a screenshot.]

Help

QA steps - Commit guidelines

[webteam-app]

Demo

Jenkins

demos.haus

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.52%. Comparing base (9cd1650) to head (b86f25c).
Report is 87 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13810   +/-   ##
=======================================
  Coverage   74.51%   74.52%           
=======================================
  Files         107      107           
  Lines        2857     2858    +1     
  Branches      957      958    +1     
=======================================
+ Hits         2129     2130    +1     
  Misses        704      704           
  Partials       24       24           

Files	Coverage Δ
...scriptionDetails/DetailsContent/DetailsContent.tsx	92.85% <100.00%> (+0.17%)	⬆️
static/js/src/advantage/tests/factories/api.ts	100.00% <ø> (ø)