[issue2551349] support @current_user in searches on MultiLink to user properties.

New submission from John Rouillard:

issue1525113 added the ability to use a token (@current_user) for a property value
in search queries. This only worked for Link's to the user class.

Extend this to MultiLinks as well so I can create and share a "My nosy issues"
that will allow a single query to work for all users to find their ID in a nosy
list property.

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components: Web interface
messages: 8036
nosy: rouilj
severity: normal
status: new
title: support @current_user in searches on MultiLink to user properties.
type: rfe

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