Mini Charts set analysis/expressions too limited

1. Multi expression handling. Currently, Mini Charts break and disappear when using multiple expressions. Sum(Field)+Avg(Field2) breaks, and it should not.

2. Set Analysis. Currently, a known limitation of Mini Charts is the ability to only handle a single instance of set analysis. Sum( {<Field2={‘A’}>} Field1).

a. Cannot use multiple expressions (see above).

b. Cannot use multiple specified fields. 

c. Cannot ignore a field selection with {<Field2=>}.