HSplitView with state saving and default props

src/qml/Base/HSwipeView.qml

@@ -0,0 +1,17 @@
+import QtQuick.Controls 2.12
+
+SwipeView {
+    currentIndex: window.getState(this, "currentIndex", defaultIndex)
+    onCurrentIndexChanged: window.saveState(this)
+
+
+    property string saveName: ""
+    property var saveId: "ALL"
+    property var saveProperties: ["currentIndex"]
+
+    property int defaultIndex: 0
+    property bool changed: currentIndex !== defaultIndex
+
+
+    function reset() { setCurrentIndex(defaultIndex) }
+}

src/qml/Chat/RoomPane/RoomPane.qml

@@ -57,10 +57,13 @@ HDrawer {
             }
         }
 
-        SwipeView {
+        HSwipeView {
             id: swipeView
+            clip: true
             interactive: ! roomPane.collapsed
-            currentIndex: 4  // XXX
+
+            saveName: "roomPaneView"
+            saveId: chat.roomId
 
             Layout.fillWidth: true
             Layout.fillHeight: true