I can't be the only one that has selected a bunch of factories, produced multiple ships at a time and accidentally created the First Switzerlake Navy.
If we had a button to disable and enable production per building, much like how railroads, barracks, and recruiting offices can be enabled or disabled, we could easily prevent this accidental production when using the province administration tool for mass builds.
While I did use it for comparison, this would be a different function from the existing disable/enable feature for the available buildings. Disabling production(my proposed QoL feature) would not remove the benefits or cost of the building, but would prevent units enabled by that building from being produced. If you disabled production on a railroad, the province would still have troop movement bonuses, and coal would still be paid daily for its maintenance, but the province would not be able to produce railroad guns. Disabling aerodrome production would prevent planes from being built, workshops prevent armored cars and balloons, barracks prevent cavalry, harbors naval units, factories the rest.