Add get parameters to return_url in login

[Pierre-Gilles]

Pull Request check-list

To ensure your Pull Request can be accepted as fast as possible, make sure to review and check all of these items:

• If your changes affects code, did your write the tests?
• Are tests passing? (npm test on both front/server)
• Is the linter passing? (npm run eslint on both front/server)
• Did you run prettier? (npm run prettier on both front/server)
• If you are adding a new features/services, did you run integration comparator? (npm run compare-translations on front)
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Description of change

Please provide a description of the change here. It's always best with screenshots, so don't hesitate to add some!

[relativeci]

Job #35: Bundle Size — 5.67MB (~+0.01%).

b3ba26b vs d61b9b8

Changed metrics (2/8)

Metric	Current	Baseline
Initial JS	2.84MB(~+0.01%)	2.84MB
Cache Invalidation	49.86%	52.28%

Changed assets by type (1/7)

	Current	Baseline
JS	3.77MB (~+0.01%)	3.77MB

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View Job #35 report on app.relative-ci.com

[codecov]

Codecov Report

Merging #1273 (e7b9183) into master (d61b9b8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1273   +/-   ##
=======================================
  Coverage   96.52%   96.52%           
=======================================
  Files         669      669           
  Lines        8595     8595           
=======================================
  Hits         8296     8296           
  Misses        299      299           

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Continue to review full report at Codecov.

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