Enable grid as view model for policy assignment screens

[karelhala]

Changes view type for policy assignment

When assigning policy for any items table (list) view is visible. This is not correct since we users expect quadicons. This PR fixes such issue adding @gtl_type to proctect method, same applies for explorer screens.

UI changes

Before

After

BZ

fixes https://bugzilla.redhat.com/show_bug.cgi?id=1553071

[karelhala]

@miq-bot add_label bug
@miq-bot assign @martinpovolny
@skateman is this going to be gaprindashvili/yes?

[miq-bot]

Checked commit karelhala@4f90258 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 0 offenses detected
Everything looks fine. 🍰

[skateman]

@miq-bot add_label gaprindashvili/yes

[martinpovolny]

@dclarizio : what's your opinion on this one?

I tried to describe the rules for GTL display mode here: https://github.com/ManageIQ/guides/blob/master/ui/gtl.md (at the bottom)

So no matter what we decide, I want it documented for future reference ;-)

[skateman]

@martinpovolny this was a grid before, just the GTL conversion happened.

[dclarizio]

@martinpovolny the special case here is that this is for policy assignment, so the quadicon view (grid) shows the policy center image better than list view, which is why it was chosen for this display. It was noticed after GTL was refactored and it changed from grid to list. So, basically, what @skateman said. :)

[martinpovolny]

Ok, merged and documented. Thx!

[martinpovolny]

A last remark: what if the entity being assigned policies does not have a quadicon? Will everything still work?

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit abd06e60edbfa13182fe4306b05633b4f79e517f
Author: Martin Povolny <mpovolny@redhat.com>
Date:   Tue Mar 27 08:09:25 2018 +0200

    Merge pull request #3554 from karelhala/quadiconPolicies
    
    Enable grid as view model for policy assignment screens
    (cherry picked from commit ee309a81df70df7fe4299983e19423a526c64480)
    
    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1561091