feat(StatusMenuItem): add support for "checked" indicator

- it is displayed on the trailing edge, next to the main text, iff the
item/action is `checked`
- fix the text elide (must have a width set)
- fix for setting the icon name/source/color if we directly use a
(Status)MenuItem (as opposed to going via (Status)Action)

ui/StatusQ/src/StatusQ/Popups/StatusMenuItem.qml

@@ -1,5 +1,6 @@
 import QtQuick 2.13
 import QtQuick.Controls 2.13
+import QtQuick.Layouts 1.15
 
 import StatusQ.Core 0.1
 import StatusQ.Core.Theme 0.1
@@ -83,9 +84,9 @@ MenuItem {
             rotation: 0
             // Link to standard Qt properties. Not because it's a good idea,
             // but because it we use it in some places and it will make refactor easier.
-            name: d.isSubMenu ? "" : root.action.icon.name
-            source: d.isSubMenu ? "" : root.action.icon.source
-            color: d.isSubMenu ? "" : root.action.icon.color
+            name: d.isSubMenu ? "" : (d.hasAction ? root.action.icon.name : root.icon.name)
+            source: d.isSubMenu ? "" : (d.hasAction ? root.action.icon.source : root.icon.source)
+            color: d.isSubMenu ? "" : (d.hasAction ? root.action.icon.color : root.icon.color)
         }
 
         readonly property StatusFontSettings defaultFontSettings: StatusFontSettings {
@@ -119,7 +120,9 @@ MenuItem {
         }
     }
 
-    contentItem: StatusBaseText {
+    contentItem: RowLayout {
+        StatusBaseText {
+            Layout.fillWidth: true
             readonly property real arrowPadding: root.spacing + (root.subMenu && root.arrow ? root.arrow.width : 0)
             readonly property real indicatorPadding: root.spacing + (root.indicator.visible ? root.indicator.width : 0)
 
@@ -132,14 +135,21 @@ MenuItem {
             text: root.text
             color: !root.enabled ? Theme.palette.baseColor1
                                  : d.isStatusDangerAction ? Theme.palette.dangerColor1
-                                                      : d.isStatusSuccessAction?
-                                                            Theme.palette.successColor1 : Theme.palette.directColor1
+                                                          : d.isStatusSuccessAction ? Theme.palette.successColor1 : Theme.palette.directColor1
 
             font.pixelSize: d.fontSettings ? d.fontSettings.pixelSize : d.defaultFontSettings.pixelSize
             font.bold: d.fontSettings ? d.fontSettings.bold : d.defaultFontSettings.bold
             font.italic: d.fontSettings ? d.fontSettings.italic : d.defaultFontSettings.italic
             elide: Text.ElideRight
         }
+        StatusIcon {
+            Layout.preferredHeight: 16
+            Layout.alignment: Qt.AlignRight
+            visible: root.checkable && root.checked
+            icon: "checkmark"
+            color: Theme.palette.primaryColor1
+        }
+    }
 
     arrow: StatusIcon {
         id: arrowIcon