Collective Remapping Materials [Outliner]

So whenever I bring a new set of meshes in blender, I obviously get lots of duplicated materials.. no big deal. But what makes this a very tedious and repetitive task is having to manually remap each material user to the correct material. Why cant i group select in the outliner and remap all them once?

How to Replicate my error: Go to Blender Mode in the outliner, open materials list, grab X amount of materials you want to collectively remap, after that, right click, Go to Remap User, then assign a new material you'd like to remap you selection to. Hit okay, the same window will pop up, but you will have to remap each material that is in your selection. very time consuming and repetitive