Batch Importing MDL Files

[ElizabethDayax]

Is your feature request related to a problem? Please describe.
When selecting multiple .mdl files in the import dialogue, only the first selected .mdl file is imported.

Is your feature request related to a specific game? Please specify.
This issue came up specifically when trying to use Garry's mod infmaps. Every chunk of the map is a .mdl file and there are several hundred .mdl files that would need to be imported. This would also be helpful in other cases where multiple models need to be imported at once.

Describe the solution you'd like
Simply have the option to import all .mdl files in a folder.

Additional context
The only additional context is that this issue came about trying to import Garry's Mod infinite maps (infmaps). These maps seem to contain an empty vmf/bsp and the map separated into chunks with several hundred small .mdl files. Importing them individually seems to place them correctly and with materials but doing this manually for several hundred .mdl files would be a pain.

(also this is my first post on github sorry if this was the wrong way of submitting this or anything!)