For some assets like Data\NPCDispositions, propagate changes even if they were applied before the game first received it.

(SMAPI assumes that if an asset is edited before the game first receives it, no asset propagation is needed since all references to it have the changes. That's true in most cases, but initial changes to Data\NPCDispositions don't affect existing NPCs since their values are cached.)

Based on this report on Nexus.

Done via requested changes to Stardew Valley 1.4.