Avoid running the same query if only outputs layers has changed

[Gustry]

If the user change only checkbox about layers, the query shoudn't be executed again and shoud use the previous result

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.