Batch edit vehicle animation frames

[Phosphorus551]

Previously discussed in the Discord server's object editor room: it would be nice to be able to edit the properties of vehicle animation frames in bulk. Simply specify a frame range, then whatever properties the user would want to alter and their new values, and all frames within the given range will have the new identical properties written to them.

This would be useful for vehicles in which their animation frames all share the same dimensions, meaning their ideal offsets will often be in the exact same position for all frames.