Global configuration changed when selecting a run

[backmari]

Short description of the changes:

Add ConfigurationHandler which connects signals from global configuration parameter UI widgets to callbacks updating the corresponding Configuration class variable.

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. Load two runs (e.g. 42536 and 42537) and add them to the reduction table
2. Modify a value in the panel "Reflectivity Extraction (Global)"
3. Double click a different run in the column "Run No." in the reduction table
4. Verify that the config value changed in 2. is still the same

References

Defect 4758: [QUICKNXS] Global options updated when selecting a run

[jmborr]

looks 👌