UI bug: tag field state not reset when opening new image/collection.

[IonoclastBrigham]

Steps:

1. Open an image
2. Edit tags
3. Optionally, save tags
4. Hit CTRL+O, select a new image, accept

Expected results: tag field state reset (unfocused, white background).

Actual results: contents are reset, but state is left as it previously was (background either gold or green, focus as it was on the previous image).

[lehitoskin]

Bug confirmed.