Revert "Remove ScrollHelper. Scrolling is fixed in Qt upstream."

This reverts commit 059d8da6b2

imports/Spectral/Component/AutoListView.qml

@@ -0,0 +1,11 @@
+import QtQuick 2.12
+
+ListView {
+    pixelAligned: true
+
+    ScrollHelper {
+        anchors.fill: parent
+
+        flickable: parent
+    }
+}