Alphabetize configuration options

[brettcannon]

Fixes #1501

This pull request:

• Has a title summarizes what is changing
• Includes a news entry file (remember to thank yourself!)
• Has unit tests & code coverage is not adversely affected (within reason)
• Works on all actively maintained versions of Python (e.g. Python 2.7 & the latest Python 3 release)
• Works on Windows 10, macOS, and Linux (e.g. considered file system case-sensitivity)

[codecov]

Codecov Report

Merging #1502 into master will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #1502      +/-   ##
=========================================
- Coverage   71.28%   71.2%   -0.09%     
=========================================
  Files         271     271              
  Lines       12639   12639              
  Branches     2273    2273              
=========================================
- Hits         9010    8999      -11     
- Misses       3493    3499       +6     
- Partials      136     141       +5

Impacted Files	Coverage Δ
src/client/debugger/PythonProcess.ts	45.83% <0%> (-5.42%)	⬇️
...rc/client/debugger/PythonProcessCallbackHandler.ts	53.61% <0%> (+0.65%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cea5b06...e74ee58. Read the comment docs.