Tag suggestions

[kirillt]

It would ease user's life if the app would suggest tags and user could just apply them. This would come in 2 forms:

1. "Quick tags" section in Gallery's tags edition dialog. Right now, "quick tags" don't contain resource-specific tags, only collection-specific (the most popular tags). We can also add "suggestions" into "quick tags".
2. Resource Grid screen can have pop-up dialog, displayed right after indexing is over. The pop-up would list unlabeled resources with "suggestions" next to them. User can approve or ignore them on per-tag basis.

"Suggestions" can be generated by similarities found. Image-based similarity search would consume too much power for mobile device, so this criteria is left for future Desktop/Server implementations. Lightweight search would include the following parameters:

• parts of filename, Levenstein distances
• EXIF-metadata of images
• text content of documents

Requires better specification

[kirillt]

@sisco0 we also can use something like dssim in addition to neural networks (like cnnembed)