homescreen: Add button to wallpaper selector to go to advanced settings

Currently you need to go from Settings -> "Switch between homescreens and more wallpaper options" to access the advanced wallpaper settings. Add a button directly into the wallpaper selector for this.

components/mobileshell/qml/homescreen/WallpaperSelector.qml

@@ -18,6 +18,8 @@ Controls.Drawer {
 
     required property bool horizontal
 
+    signal wallpaperSettingsRequested()
+
     onOpened: {
         wallpapersView.forceActiveFocus()
     }
@@ -45,7 +47,37 @@ Controls.Drawer {
         snapMode: ListView.SnapToItem
         model: imageWallpaper.wallpaperModel
         // onCountChanged: currentIndex =  Math.min(model.indexOf(configDialog.wallpaperConfiguration["Image"]), model.rowCount()-1)
-        headerPositioning: ListView.PullBackHeader
+        headerPositioning: ListView.InlineHeader
+
+        header: Controls.ItemDelegate {
+            id: openSettings
+            width: imageWallpaperDrawer.horizontal ? parent.width : height * (imageWallpaperDrawer.width / imageWallpaperDrawer.Screen.height)
+            height: imageWallpaperDrawer.horizontal ? width / (imageWallpaperDrawer.Screen.width / imageWallpaperDrawer.Screen.height) : parent.height
+            padding: Kirigami.Units.gridUnit / 2
+            leftPadding: padding
+            topPadding: padding
+            rightPadding: padding
+            bottomPadding: padding
+
+            background: Rectangle {
+                color: Qt.rgba(255, 255, 255, (openSettings.down || openSettings.highlighted) ? 0.3 : 0.2)
+                radius: Kirigami.Units.gridUnit / 4
+                anchors.fill: parent
+                anchors.margins: Kirigami.Units.gridUnit / 4
+            }
+
+            contentItem: Item {
+                Kirigami.Icon {
+                    anchors.centerIn: parent
+                    implicitHeight: Kirigami.Units.iconSizes.large
+                    implicitWidth: Kirigami.Units.iconSizes.large
+                    source: 'list-add'
+                }
+            }
+
+            onClicked: imageWallpaperDrawer.wallpaperSettingsRequested()
+            Keys.onReturnPressed: clicked();
+        }
 
         delegate: Controls.ItemDelegate {
             width: imageWallpaperDrawer.horizontal ? parent.width : height * (imageWallpaperDrawer.width / imageWallpaperDrawer.Screen.height)

containments/homescreens/folio/package/contents/ui/settings/SettingsComponent.qml

@@ -190,6 +190,11 @@ Item {
             onClosed: {
                 wallpaperSelectorLoader.active = false;
             }
+
+            onWallpaperSettingsRequested: {
+                close();
+                homeScreen.openConfigure();
+            }
         }
     }
 }

containments/homescreens/halcyon/package/contents/ui/SettingsScreen.qml

@@ -127,6 +127,10 @@ Item {
             onClosed: {
                 wallpaperSelectorLoader.active = false;
             }
+            onWallpaperSettingsRequested: {
+                close();
+                root.homeScreen.openContainmentSettings();
+            }
         }
     }
 }