This mod does 4 things.
1. Automatically opens the pause screen again after using a vial or food item.
2. Reduces the amount of time it takes to saw off a corpse's head.
3. Makes it so no dialogue option is selected by default in conversations, preventing you from accidentally hitting an option.
4. Lets you use the brown vial outside of combat.

Download it here, just unzip the contents into the game's folder.[files.catbox.moe]

I haven't tested the mod a lot so it's possible that it's very broken. Be sure to back up your files before using it.
Any updates to the game are almost guaranteed to break this mod.
And in case you're wondering why using a vial or food item only opens the pause menu instead of returning you to the inventory proper, it's because RPGMaker is hell.