Support more complex / nested operations in EnhancedGrid Filter plugin

[Kenneth G. Franqueiro]

The EnhancedGrid? Filter plugin (originally ticket #11724) affords the ability to perform advanced user-defined filtering on client and server.

However, it seems as if the UI and exposed APIs are currently limited at performing a single series of filters in either an "any" or "all" fashion, e.g.:

cond1 OR cond2 OR cond3

It would be useful to also allow more complex queries (in both UI and API), for example allowing nested combinations of any and all queries, e.g.:

(cond1 OR cond2 OR cond3) AND (cond4 OR cond5 OR cond6)

If my current (admittedly limited) understanding is correct, such level of functionality isn't currently exposed. However, I did notice implementations of individual logical operators such as AND, OR, etc. which don't seem to actually be employed in the code, so I am wondering whether support for this is already halfway there, or perhaps I've missed something entirely.

[Evan]

Though this is still not UI-supported in ​gridx, the underneath logic is already supported.

So closing as wontfix as all new grid reqts are supposed to be addressed by dgrid or gridx.