Navigate to plan page automatically when starting migration

[mturley]

Resolves #442

[konveyor-preview-bot]

🚀 Deployed Preview: http://konveyor-forklift-ui-pr-531-preview.surge.sh ✨

Compare with current main branch: http://konveyor-forklift-ui-preview.surge.sh

[codecov]

Codecov Report

Merging #531 (9d641c0) into main (35ca5c1) will decrease coverage by 0.03%.
The diff coverage is 12.50%.

@@            Coverage Diff             @@
##             main     #531      +/-   ##
==========================================
- Coverage   59.73%   59.70%   -0.04%     
==========================================
  Files         133      133              
  Lines        4297     4301       +4     
  Branches     1069     1069              
==========================================
+ Hits         2567     2568       +1     
- Misses       1706     1709       +3     
  Partials       24       24              

Impacted Files	Coverage Δ
src/app/queries/migrations.ts	19.48% <0.00%> (ø)
src/app/Plans/PlansPage.tsx	45.83% <20.00%> (-4.17%)	⬇️

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