[reports] Analyzer hint on experiment lists

Because the analyzer plays an important role on the search and on the reports, it would be good if it is also displayed along side experiment tables (e.g., on the user microsite or by the end of a toolchain page). This would help users avoid the selection of experiments without matching analyzers and would understand why there are errors when neglecting that piece of information.

Furthermore, when refusing to add experiments, a list of conflicting choices and the reasoning why one can't add an experiment would be welcome, if easy to implement.