JQL: In Auto complete we should not be displaying any option after user has selected filter keyword.

Steps:
1. Login to JIRA.
2. Try to write a query as filter =

Result:
1. User get "Current user() and now()" function as auto complete options.

Expected:
1. As these option are irrelevant in regards to filter, we should n't be displaying it.
2. As there is no support of Auto complete for filter, no option should be displayed.