Fix: show mini-ticket dashboard for helpdesk profiles

[Rom1-B]

Checklist before requesting a review

Please delete options that are not relevant.

• I have read the CONTRIBUTING document.
• I have performed a self-review of my code.
• I have added tests that prove my fix is effective or that my feature works.
• This change requires a documentation update.

Description

• It fixes !45067

This restores the behaviour previously provided by the FormCreator plugin.

Self-service/helpdesk profiles now see the mini-ticket dashboard (count boxes) above the ticket list, both on the helpdesk home page and on front/ticket.php.
Three changes make this work: canViewCurrent() grants access to system mini_core dashboards for helpdesk users who hold any ticket read right; the central-only guard in HTMLSearchOutput::showPreSearchDisplay() is removed; and the tickets sector is added to $CFG_GLPI['javascript'] so gridstack.js and its CSS are loaded on front/ticket.php for helpdesk users.

Screenshots (if appropriate):

[AdrienClairembault]

Was this discussed with @orthagh?

It's been a while so I am not 100% sure but I think omitting this dashboard for self service users was done on purpose.
I think the issue for us was that most of these widgets are useless for a common self service requester.

There are edge cases (sometimes power users end up as self service like our partners on our own support who can have a lot of tickets for multiple clients), for which we added the ability to display any dashboards on the helpdesk home page (you just need to share a dashboard with the target user).

That's how I remember it, feel free to correct me if I'm wrong :)

[Rom1-B]

I understand; it's true that this isn't relevant for all self-service profiles, but FC used to provide it, so it might be frustrating for those who found it useful. As a temporary solution, could we perhaps add a setting to the profiles to enable or disable it? (It wouldn't be enabled by default)

[Rom1-B]

I forwarded Adrien's response to the client. It seems to have satisfied her, so we can either continue or close the case, whichever you prefer; either is fine with me.

[orthagh]

I'm inclined to let it off, if the current situation is fine for the customer.