Upper-bound length of default time vector

[baggepinnen]

closes #880

[JuliaControlBot]

This is an automated message.
Plots were compared to references. 11/11 images have changed, see differences below.
After pulling this PR, please update the reference images by creating a PR to ControlExamplePlots.jl here.

Difference	Reference Image	New Image
❌ 0.047
✔️ 0.011
✔️ 0.001
✔️ 0.001
✔️ 0.007
✔️ 0.003
✔️ 0.0
⚠️ 0.028
❌ 0.06
✔️ 0.0
⚠️ 0.017

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (16aa4bc) 92.72% compared to head (ce31629) 56.53%.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #887       +/-   ##
===========================================
- Coverage   92.72%   56.53%   -36.20%     
===========================================
  Files           5        5               
  Lines         330      329        -1     
===========================================
- Hits          306      186      -120     
- Misses         24      143      +119     

see 3 files with indirect coverage changes

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