Adjust REF_M reduction configuration form layout

[backmari]

Description of the changes

The layout of the REF_M reduction configuration form is compressed to half the width of the page: https://monitor.sns.gov/reduction/ref_m/
Adjust the template style to make the form easier to read.

Before:

After:

Check all that apply:

• updated documentation
• Source added/refactored
• Added unit tests
• Added integration tests
• (If applicable) Verified that manual tests requiring the /SNS and /HFIR filesystems pass without fail

References:

• Links to IBM EWM items: Task 9078: [MrRed] Improve rendering of page reduction/ref_m
• Links to related issues or pull requests:

Manual test for the reviewer

Start up WebMon locally, navigate to http://localhost/reduction/ref_m/ and verify that the configuration form layout looks as in the "After" image above.

Check list for the reviewer

• best software practices
  • clearly named variables (better to be verbose in variable names)
  • code comments explaining the intent of code blocks
• All the tests are passing
• The documentation is up to date
• code comments added when explaining intent

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.88%. Comparing base (c91f6dd) to head (cc5792a).

Additional details and impacted files

@@            Coverage Diff             @@
##             next     #209      +/-   ##
==========================================
- Coverage   77.92%   77.88%   -0.05%     
==========================================
  Files          54       54              
  Lines        4734     4734              
==========================================
- Hits         3689     3687       -2     
- Misses       1045     1047       +2     

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