Scenario filtering empty parameter fix

[michal-pekacki]

Issues addressed by this PR

Closes #1217

Fixed Passes method to work with empty parameter values correctly.

Test files

Revit 2018 model

1. Open Insulation Tool setting window
2. Set filtering in scenario for any parameter as Not Equal or Not Contains (may be Comments)
3. Run apply method

Changelog

Additional comments

[pawelbaran]

Good tweaks in general, I may have found a few further improvements - see the code comments

[pawelbaran]

Happy to approve the changes now

[pawelbaran]

@BHoMBot check required

[bhombot-ci]

@pawelbaran to confirm, the following checks are now queued:

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There are 17 requests in the queue ahead of you.

[pawelbaran]

@BHoMBot check required

[bhombot-ci]

@pawelbaran to confirm, the following checks are now queued:

• code-compliance
• documentation-compliance
• project-compliance
• core
• null-handling
• serialisation
• versioning
• installer

[michal-pekacki]

@BHoMBot versoning

[bhombot-ci]

@michal-pekacki sorry, I didn't understand.
Was that comment an instruction for me? If so, could you state again what check you would like me to do?
For a list of available instructions, please see this wiki page.

[pawelbaran]

@BHoMBot check versioning
@BHoMBot check copyright-compliance
@BHoMBot check dataset-compliance
@BHoMBot check ready-to-merge

[bhombot-ci]

@pawelbaran to confirm, the following checks are now queued:

• versioning
• copyright-compliance
• dataset-compliance
• ready-to-merge