Create default behavior for new elements created under Class of Service rules

It would be useful to have a default behavior in COS module for new elements created in PBX, when a rule is applied. 

For example, if you have a rule to deny all extensions to dial using a specific route/trunk and another one to only allow certain extensions to use it; by default COS module does not add new extensions as members from the deny rule, making it able to use that route/trunk until extension is manually added as member of the deny rule.

On the other hand, if you create a new feature code to be used by all extensions, COS module denies new feature codes by default, needing to manually set them when creating a feature code for say a new system recording. 

It may help to prevent non-contemplated rule changes if you can manually set a behavior for each tab

for example:

• add/exclude new extensions to the members of this rule by default
• add/exclude new features code to be allowed or denied

and so on