Case sensitivity of filter operators

[geneticdrift]

Currently the case sensitivity of filter operators is determined by the command.

For example the contains operator is case sensitive in list command and case-insensitive in search.

It means that for a case-insensitive list command a new command needs to be added, like searchcount was added for case-insensitive version of count.

It also means that it's impossible to have case-sensitive and case-insensitive operators mixed in the same filter.

Would it make sense to add operators that are explicitly case-sensitive or not that can be used with any command which will override the default case-sensitivity of the command?

Proposed new operators:

Existing operator unchanged: depends on command	New operator: case-sensitive	New operator: case-insensitive
==	eq_cs	eq_ci
!=	ne_cs	ne_ci
contains	contains_cs	contains_ci
starts_with	starts_with_cs	starts_with_ci

[geneticdrift]

Added PR #2064