Synchronization filters with any-to-any links could be better formatted

[Nicklas Nordborg]

Displaying and filtering on custom any-to-any linked columns was implemented in #2222.

When such columns are used in synchronization filters they are displayed in the same syntax that is used in the definition. Example:

|genereport.pdf|FILE|name = '%'

While this is readable and understandable, it is not following the same pattern as other column filters. Suggested syntax:

link(genereport.pdf, FILE).name = '%'

[Nicklas Nordborg]

In 7880:

Fixes #2230: Synchronization filters with any-to-any links could be better formatted