fm-editor: add a linkedSearchConditions field option

fm-editor: add a linkedSearchConditions field option

This option allows the caller to specify conditions to add
when retrieving values for a linked field, e.g., to specify
that only active values should be fetched.

Example usage:

[fieldOptions]="{fund:{linkedSearchConditions:{'active':'t'}}}"

If the underlying record has a value set for the linked field, that
value will be included when preloadLinkedValues and the value
doesn't otherwise meet the search conditions.

This patch also sorts the values if preloadLinkedValues is used.

TODO: add a limit condition?

Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>