Camera RAW images handling enhancements

[bananakid]

I'd like to leave a small enhancement request:

• An option to disable processing of RAW images (.CR2, .CR3, .DNG, .NEF, .RAW, etc.)
  Here's a sample file viewed in qView
  
  Here's a sample file viewed in XnView MP
  
  
• An option to view RAW images in half-size (as in XnView MP this improves loading time tremendously, please see previous screenshot for settings sample)
• An option (or better, a taggable option in View menu) to view embedded previews of RAW images instead of RAW images
  Again, a sample file viewed in qView
  
  And here's the embedded preview of this CR2 file after being extracted using ExifTool
  exiftool -b -PreviewImage -w .jpg RAW_CANON_EOS_5DS.CR2
  
  Thank you for all the other improvements to qView!