Dead-time correction algorithm and UI elements for settings

[backmari]

Short description of the changes:

This branch combines back-end changes by @mdoucet in the branch: https://github.com/neutrons/reflectivity_ui/tree/dead_time
and adds UI changes by @searscr and @backmari.

Long description of the changes:

• new Mantid-style algorithm SingleReadoutDeadTimeCorrection
• logic to apply dead-time correction when a file is loaded
• UI elements to configure dead-time correction settings (applied globally for all runs)
• logic to reload files upon changes in the dead-time correction settings

TODO: add unit testing of the new algorithm SingleReadoutDeadTimeCorrection

Check list for the pull request

• I have read the [CONTRIBUTING]
• I have read the [CODE_OF_CONDUCT]
• I have added tests for my changes
• I have updated the documentation accordingly

Check list for the reviewer

• I have read the [CONTRIBUTING]
• I have verified the proposed changes
• best software practices
  • all internal functions have an underbar, as is python standard
  • 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

Manual test for the reviewer

1. Open the file
   REF_M_42112+42113_Specular_SA_test_dead-time_datarepo.dat.txt
   and edit the 4 file paths to point to the location of your data repo folder. (Can remove the .txt filename suffix added to fool GitHub.)
2. Load the reduced file in QuickNXS.
3. Verify that the "Dead Time Correction" options are available in the UI and test that checking/unchecking the checkbox enables/disables the "Settings" button.
4. The files in the reduction table and direct beam table need to be reloaded when the dead-time settings are changed, and the user is asked to confirm before reloading. Verify that all other configuration stays the same when dead-time settings are changed.
5. Verify that the reflectivity plot is updated when dead-time settings are changed.

References

Story 5023: [QUICKNXS] Add dead time options to UI

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 52.38095% with 120 lines in your changes missing coverage. Please review.

Project coverage is 44.96%. Comparing base (3a7d763) to head (9b869a7).

Files	Patch %	Lines
..._ui/interfaces/data_handling/DeadTimeCorrection.py	22.41%	45 Missing ⚠️
...ectivity_ui/interfaces/data_handling/instrument.py	36.36%	28 Missing ⚠️
...ivity_ui/interfaces/event_handlers/main_handler.py	10.00%	27 Missing ⚠️
reflectivity_ui/interfaces/data_manager.py	57.14%	9 Missing ⚠️
reflectivity_ui/ui/deadtime_settings.py	83.78%	6 Missing ⚠️
reflectivity_ui/ui/deadtime_entry.py	88.88%	4 Missing ⚠️
reflectivity_ui/interfaces/main_window.py	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             next      #95      +/-   ##
==========================================
+ Coverage   35.43%   44.96%   +9.52%     
==========================================
  Files          30       33       +3     
  Lines        6067     6310     +243     
==========================================
+ Hits         2150     2837     +687     
+ Misses       3917     3473     -444     

☔ View full report in Codecov by Sentry.
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[backmari]

Comments from Mat:

• need to recalculate the reflectivity when files are reloaded
• does the cache need to cleared?
• reload only the files in the tables and not all in the cache?
• keep the settings when reloading the files
• default to dead-time settings off

[jmborr]

can you add instructions for a "Manual Test"?

[jmborr]

@backmari codecov says the patch coverage is only 49%. You introduced some new functions. Did you write unit tests for them?