Add function for testing load path of 2x image
Remove #is_external

We don't need this anymore because we're going to try to load the image
regardless of where it lives.
Check 2x variant by attempting to load 2x image
Fix condition for checking confirmed 2x paths
Merge branch 'chris/load-variant-in-image-tag'

* chris/load-variant-in-image-tag:
  Fix condition for checking confirmed 2x paths
  Check 2x variant by attempting to load 2x image
  Remove #is_external
  Add function for testing load path of 2x image