fancy tag input

[vincent-peugnet]

Add some JS to achieve a smoother tagging experience.

This library: https://github.com/yairEO/tagify seems pretty interesting to help in this task.

This need to be fully reversible when in "no JS" mode.
To achieve this, I would prefer to keep the "comma and one space" separated value format.
Look's like it's possible: https://github.com/yairEO/tagify#modify-original-input-value-format

• use clickable
• load predefined list of tags
• color the tags

Later, I could use it as well in bulk edit in the home interface