Add "is_all_of" to selection type in expressions

[TristanMcHardie]

Expressions have is_any_of and is_none_of selection types, but is_all_of (or similar) would be even more useful. For example, to build an expression to select components having all the selected labels.

I realise that behind the expression builder the underlying queries for "any" and "none" are SQL-like "IN (...)" and "NOT IN (...)" and that "all" doesn't really work using IN/NOT IN.

[JoeyHarig]

Hi Tristan,

We are introducing support for multiple 'Having' clauses of the same resource type (labels) in the next release. You will be able to achieve filtering by more than one label by adding a new 'Having' clause for each label.