Merge branch '3.4'

plugins/Toolbox/resources/qml/ToolboxDetailList.qml

@@ -14,6 +14,7 @@ Item
         frameVisible: false
         anchors.fill: detailList
         style: UM.Theme.styles.scrollview
+        flickableItem.flickableDirection: Flickable.VerticalFlick
         Column
         {
             anchors

plugins/Toolbox/resources/qml/ToolboxDownloadsPage.qml

@@ -12,6 +12,7 @@ ScrollView
     width: parent.width
     height: parent.height
     style: UM.Theme.styles.scrollview
+    flickableItem.flickableDirection: Flickable.VerticalFlick
     Column
     {
         width: parent.width - 2 * padding

plugins/Toolbox/resources/qml/ToolboxInstalledPage.qml

@@ -15,6 +15,7 @@ ScrollView
     width: parent.width
     height: parent.height
     style: UM.Theme.styles.scrollview
+    flickableItem.flickableDirection: Flickable.VerticalFlick
     Column
     {
         spacing: UM.Theme.getSize("default_margin").height