Fix scrolling in RoomPage

This now use the ScrollablePage native scroll effect when the ScrollPage
only have one scrollview has child item.

imports/NeoChat/Page/RoomPage.qml

@@ -28,6 +28,7 @@ Kirigami.ScrollablePage {
 
     title: currentRoom.name
 
+    ListView {
         MessageEventModel {
             id: messageEventModel
 
@@ -101,8 +102,6 @@ Kirigami.ScrollablePage {
                 return messageEventModel.data(messageEventModel.index(row, 0), MessageEventModel.MessageRole) !== 0x10 && messageEventModel.data(messageEventModel.index(row, 0), MessageEventModel.EventTypeRole) !== "other"
             }
         }
-
-    ListView {
         readonly property int largestVisibleIndex: count > 0 ? indexAt(contentX + (width / 2), contentY + height - 1) : -1
         readonly property bool noNeedMoreContent: !currentRoom || currentRoom.eventsHistoryJob || currentRoom.allHistoryLoaded
 
@@ -309,10 +308,11 @@ Kirigami.ScrollablePage {
             }
         }
 
-        QQC2.Button {
+        QQC2.RoundButton {
             anchors.right: parent.right
             anchors.top: parent.top
-            anchors.topMargin: 16
+            anchors.topMargin: Kirigami.Units.largeSpacing
+            anchors.rightMargin: Kirigami.Units.largeSpacing
 
             padding: 8
 
@@ -356,7 +356,6 @@ Kirigami.ScrollablePage {
 
             positionViewAtBeginning()
         }
-    }
 
         DropArea {
             id: dropAreaFile
@@ -378,6 +377,19 @@ Kirigami.ScrollablePage {
             }
         }
 
+        Component {
+            id: messageDelegateContextMenu
+
+            MessageDelegateContextMenu {}
+        }
+
+        Component {
+            id: messageSourceSheet
+
+            MessageSourceSheet {}
+        }
+    }
+
     footer: ChatTextInput {
         id: chatTextInput
         Layout.fillWidth: true
@@ -432,16 +444,4 @@ Kirigami.ScrollablePage {
         })
         contextMenu.open()
     }
-
-    Component {
-        id: messageDelegateContextMenu
-
-        MessageDelegateContextMenu {}
-    }
-
-    Component {
-        id: messageSourceSheet
-
-        MessageSourceSheet {}
-    }
 }