Add title to background tasks and improve the UI

[MikeAlhayek]

Fix #13045

Here is a summary of the changes

• New search bar was added to the list page
• Technical Name is no longer visible. Instead we show a title.
• The Create action was removed from the controller as we can never create a background task using a UI.
• The Edit action will now create an settings-entry in the document if an entry does not exists.

Here are some screenshots after this PR

Here are some screenshots prior this PR

[hishamco]

Are we agreed on that?

Is that title comes from the user input? if Yes, how we can guarantee that there's no duplicate. BTW I'm not against the idea, but sometimes we need to discuss before submitting a PR

[MikeAlhayek]

The title is something you define in the Attribute. We still identify the task by it type's full name so even if we have name conflict, it should not matter.