Be able to negate any condition when using the "Find issue" tool

Hi all,

Our Jira users are requesting the possibility to negate some criteria when performing when searching issues. This is especially important for attributes which have a large number of possible values.
For example, it would be nice to be able to define a query:
"Find all open issues which are not on version 4.5 or 4.6".
Right now, to get this results one has to select all the versions except 4.5 and 4.6, which is error-prone.

Thank you for looking at this possibilities.
Cheers
Pierrick.