fix: layout responsive for edit page

[ihor-romaniuk]

TL;DR -

This pull request contains mobile phone adaptation fixes for Problem Editor page.
Added general rearrangement of pages, indentations, and fixed element deformation during adaptation.

Related PRs:

• frontend-lib-content-components main fix: layout responsive frontend-lib-content-components#422
• frontend-app-course-authoring quince fix: layout responsive for edit page #921
• frontend-app-course-authoring master fix: layout responsive for edit page #922

What changed?

Before	After

Before	After

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Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (open-release/redwood.master@a63409e). Learn more about missing BASE report.

Additional details and impacted files

@@                      Coverage Diff                       @@
##             open-release/redwood.master    #1058   +/-   ##
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  Coverage                               ?   92.27%           
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  Files                                  ?      708           
  Lines                                  ?    12496           
  Branches                               ?     2715           
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  Hits                                   ?    11531           
  Misses                                 ?      928           
  Partials                               ?       37           

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[rayzhou-bit]

I tested this in hosted devstack. Exit confirmation looks great! Multi-select problem unfortunately does not display properly on mobile at the moment so that portion did not come across on testing.

[rayzhou-bit]

Hi @ihor-romaniuk I accidentally merged this change in. I reverted it after. Could you create another PR and I'll approve it?