Fixed extra white space issue on book preview modals

[DachiCharkviani]

Closes #10095

Worked with @graissov and @khiyami on this issue.

Fix/Refactor excess whitespace on book review pop-ups.

Technical

Testing

Go to this page and click preview(or any other book with preview): http://localhost:8080/works/OL16086453W/Pioneers

Screenshot

Before:

After:

Stakeholders

@RayBB

[DachiCharkviani]

@RayBB Could you please review this PR. I believe I am done with issue #10095

[RayBB]

@DachiCharkviani my local environment to test changes is broken and I'm working on fixing it.
I hope @cdrini can check this out this week.

[DachiCharkviani]

Hello, @RayBB Thank you for your answer. No rush, but if it is processed as soon as possible that will greatly benefit me since I have to show in my college class that I have successful merge in open source code on git for extra credit. Once, again thanks.

@cdrini Waiting for your approval then! All the best.

[DachiCharkviani]

Hello, @RayBB, @cdrini , if you could please review the merge for this issue, I would be very thankful for that. I will get extra for the potential PR merge, and save my grade. Thank you in advance. I believe the issue is solved with this code.

[RayBB]

Please remove all changes not related to the modal.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 17.44%. Comparing base (347bff9) to head (93ae194).
Report is 152 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10142      +/-   ##
==========================================
+ Coverage   17.12%   17.44%   +0.31%     
==========================================
  Files          89       89              
  Lines        4752     4792      +40     
  Branches      831      848      +17     
==========================================
+ Hits          814      836      +22     
- Misses       3428     3436       +8     
- Partials      510      520      +10     

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[DachiCharkviani]

@RayBB done!

[DachiCharkviani]

@RayBB Could you please respond for the merge? If everything is on point and satisfies the requirements I would like to proceed as soon as possible because deadline for the credit is today night.

[DachiCharkviani]

@cdrini @RayBB I believe the merge is ready. Could you please review?

[RayBB]

@DachiCharkviani great work!

I tested this on desktop and on mobile and it works great.
One small change I pushed up is to remove some unused css after you removed the class.
Removing the floater and the iframe-container class were both needed.

Now we just need one of the staff to review/merge it.
Probably @cdrini but I think he might be on vacation now.