Update AddCoolingProfile.py

[GregValiant]

Add control for a Build Volume fan.
Add 'Idle speed' for the inactive extruder rather than always going to "0".
General cleanup in the code and changed variable "curaApp" to "global_stack".

Type of change

• [ X] New features (non-breaking change which adds functionality)

Test Configuration:

• Operating System:
  Win 10 Pro
  All Cura versions

Checklist:

• [ X] My code follows the style guidelines of this project as described in UltiMaker Meta and Cura QML best practices
• [X ] I have read the Contribution guide
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ X] I have uploaded any files required to test this change

[github-actions]

Test Results

23 370 tests  ±0   23 368 ✅ ±0   45s ⏱️ -1s
     1 suites ±0        2 💤 ±0 
     1 files   ±0        0 ❌ ±0 

Results for commit fba94ae. ± Comparison against base commit 75cf32c.

♻️ This comment has been updated with latest results.

[HellAholic]

Code could use a bit more cleaning up imo, some of the if statements for example could be simplified. You could also do the init() and define self.curaApp and use that instead of Application.getInstance().getGlobalContainerStack() or setting the curaApp in different functions or in the if statements.

[GregValiant]

Changes made.
I also added the "if ';POSTPROCESSED' in data[0]" exit line so the script can't run twice.

A little history...This was the first script I'd written. I took it on because I needed it for PETG, and because it had been a feature request here since 2017 and no one else had bothered. I'm quite pleased that there has never been a bug report regarding it (knock-on-wood).