Hidden files are not excluded from get_$model_file() methods

[yuimbo]

I am using OSX and store my models on an external drive.

This has the unfortunate side-effect of creating ._filename files for every file:

$ ls -la
.
..
._ip-adapter-full-face_sd15.safetensors
._ip-adapter-plus-face_sd15.safetensors
._ip-adapter-plus-face_sdxl_vit-h.safetensors
._ip-adapter-plus_sd15.safetensors
._ip-adapter-plus_sdxl_vit-h.safetensors
._ip-adapter_sd15.safetensors
._ip-adapter_sd15_light_v11.bin
._ip-adapter_sd15_vit-G.safetensors
._ip-adapter_sdxl.safetensors
._ip-adapter_sdxl_vit-h.safetensors
ip-adapter-full-face_sd15.safetensors
ip-adapter-plus-face_sd15.safetensors
ip-adapter-plus-face_sdxl_vit-h.safetensors
ip-adapter-plus_sd15.safetensors
ip-adapter-plus_sdxl_vit-h.safetensors
ip-adapter_sd15.safetensors
ip-adapter_sd15_light_v11.bin
ip-adapter_sd15_vit-G.safetensors
ip-adapter_sdxl.safetensors
ip-adapter_sdxl_vit-h.safetensors

Since the methods for finding models (for example get_ipadapter_file()) use regexp to find the model, it will return the first match in alphabetical order.

This causes the node to break, since it will always try to use the ._ files instead of the model itself.