Show friendly message instead of maxClauseCount error

When a page action (such as the contributors macro) triggers the Lucene "maxClauseCount" error, instead of showing that exact error in the UI, show a user-friendly message such as "Your query is too broad, please limit it" or something like that, to let the user know why the error is returned and how to possibly prevent it.

And retain the actual "maxClauseCount" error in the logs to help support troubleshoot such issues.