D23501: If a submenu action has an icon set, make sure to also display it

[Arjen Hiemstra]

ahiemstra created this revision.
ahiemstra added reviewers: Kirigami, mart.
Herald added a project: Kirigami.
Herald added a subscriber: plasma-devel.
ahiemstra requested review of this revision.

REVISION SUMMARY
  QQC2's Menu does not support icons, but the MenuItem that gets created
  when it is used as a submenu does. Since we already have a reference to
  that MenuItem, also update the MenuItem's icon property with those of
  the Action. This way submenus will properly display icons if set.

TEST PLAN
  The following test code, ran through qmlscene, should produce a context menu
  with icons for both entries, even though one of them is a menu.
  
  Note that you will need D23499 <https://phabricator.kde.org/D23499> for the 
context menu button to show up again.
  
    import QtQuick 2.12
    import QtQuick.Controls 2.12
    
    import org.kde.kirigami 2.8 as Kirigami
    
    Kirigami.ApplicationWindow {
        pageStack.initialPage: Kirigami.Page {
            actions.main: Kirigami.Action { text: "Main"; icon.name: 
"document-new" }
            actions.contextualActions: [
                Kirigami.Action { text: "Action 1"; icon.name: "document-new" },
                Kirigami.Action {
                    text: "Action 2"
                    icon.name: "document-new"
                    Kirigami.Action { text: "Nested Action" }
                }
            ]
        }
    }

REPOSITORY
  R169 Kirigami

BRANCH
  actionmenu_icons

REVISION DETAIL
  https://phabricator.kde.org/D23501

AFFECTED FILES
  src/controls/private/ActionsMenu.qml

To: ahiemstra, #kirigami, mart
Cc: plasma-devel, fbampaloukas, GB_2, domson, dkardarakos, apol, 
davidedmundson, mart, hein