Align OperatorTypes for advanced filtering

[tschirky]

The currently available OperatorTypes for advanced filtering are the following:

public enum OperatorTypeEnum
{
    NumberGreaterThan,
    NumberGreaterThanOrEquals,
    NumberLessThan,
    NumberLessThanOrEquals,
    NumberIn,
    NumberNotIn,
    BoolEquals,
    StringContains,
    StringBeginsWith,
    StringEndsWith,
    StringIn,
    StringNotIn
}

In the meantime, Azure Event Grid provides the following additional ones:

NumberInRange
NumberNotInRange
StringNotContains
StringNotBeginsWith
StringNotEndsWith
IsNullOrUndefined
IsNotNull

I was wondering whether you plan on aligning the Operator Types?
Obviously it would be highly appreciated, as we like your tool and use it regularly for local testing.