Issue with autocomplete widget values

[mpeeters]

We discovered an issue introduced by commit 40f992e#diff-11b1b0a09c524cdf8b6e64f485a18017236902ce143fee65c5529e5fe0c5233b

When filter is applied by clicking on search button, the value displayed change and are replaced by it's value instead of it's title (example: object UID instead of object title).