[Solr search] Auto-switch to expert mode when search field contain a facet field

[youennmerel]

When a valid field name (e.g. centerName, datasetCreationDate, studyName, etc) followed by : and any string is submitted in the Solr search field, the "Expert mode" should be automatically switched on.

Conversely, "Expert mode" should be automatically switched off if no query syntax is detected.

We could even add auto-complete for these fields !

Also, we could also maybe show more of the error message from Solr instead of just "syntax error", e.g. Cannot parse 'examinationId:': Encountered "<EOF>" at line 1, column 14.