Usability testing - update "invalid query_context specified" error message to give direction to the user

Usability testers hitting "invalid query_context specified" error message, were not able to figure out the issue. 

MB-48988 - is raised to address adding the query_context label to the query_context drop down. 

This issue is raised to include additional message to the error message "invalid query_context specified" to give the user all three parts perhaps:

• problem identification,

• cause details 

• and a solution if possible