Extend Global search to become "Global"

The "Global search" ist not really global yet.

It should be extended to search global as per its name. It should list all items that contain the search-text. For example i search for "ABC" and I expect to get a list of all items (assets, tickets, projects) where this text was used. It does not matter if the ticket is closed or open, the project is completed or not. I want to get ALL items as it is labeled as "Global search". I even want to get tickets included if the text was used only in a comment.

This is how a normal global search works in any other ITSM-Tool. Hope GLPI gets soon also this improvement.