Search: Standardize search behavior

[kalisp]

Story

Different graphQL resolvers handle Search content differently.

Some are parsing it first by ',' and then slugify:

• tasks
• entityLists
• folders

Some just slugify:

• entityListItems
• products,
• representations
• versions
• workfiles

To reproduce

1. search content with ',' should be behaving differently in different resolvers

Expected behavior

This should be synchronized to single approach, if it is not by design. In that case it could be somewhere documented.

Environment

1.16.1+DEVELOP

[kalisp]

#1021 (review)