notifier module improvements and regex support

[noramibu]

Type of change

• Bug fix
• New feature

Description

• Added regex filtering with priority over ignore settings
• Also merged filtering logic into single method
• Hided related settings when parent option is off

Related issues

Fixes #5609

How Has This Been Tested?

Tested in multiplayer, works fine

Checklist:

• My code follows the style guidelines of this project.
• I have added comments to my code in more complex areas.
• I have tested the code in both development and production environments.