Possibility to load all thumbnails only for specific folders

[Leo]

Here's a script add-in which makes use of the new command:

Auto-load Thumbnails only in specific folders

Overview: The add-in lets you tell Opus to load all thumbnails in specific folders, when you don't want to do so in all folders. It usually only makes sense to install the add-in if you have turned off the Load all thumbnails in a folder automatical…