Add an option to lazy load room message at initial sync.

Reduces initial sync time. Useful if you joined a lot of rooms and have
a slow homeserver.

qml/form/RoomForm.qml

@@ -43,9 +43,16 @@ Item {
 
             Label {
                 width: parent.width
+                horizontalAlignment: Text.AlignHCenter
                 text: currentRoom && currentRoom.id ? currentRoom.id : ""
             }
 
+            Label {
+                width: parent.width
+                horizontalAlignment: Text.AlignHCenter
+                text: currentRoom && currentRoom.canonicalAlias ? currentRoom.canonicalAlias : "No Canonical Alias"
+            }
+
             RowLayout {
                 width: parent.width
 
@@ -109,6 +116,12 @@ Item {
 
                 color: Material.theme == Material.Light ? "#eaeaea" : "#242424"
 
+                MouseArea {
+                    anchors.fill: parent
+
+                    onClicked: roomDrawer.open()
+                }
+
                 RowLayout {
                     anchors.fill: parent
                     anchors.margins: 16
@@ -122,12 +135,17 @@ Item {
                         displayText: currentRoom ? currentRoom.displayName : ""
                     }
 
-                    Column {
+                    ColumnLayout {
                         Layout.fillWidth: true
                         Layout.fillHeight: true
+                        Layout.alignment: Qt.AlignHCenter
+
+                        visible: parent.width > 80
 
                         Label {
-                            width: parent.width
+                            Layout.fillWidth: true
+                            Layout.fillHeight: true
+
                             text: currentRoom ? currentRoom.displayName : ""
                             font.pointSize: 16
                             elide: Text.ElideRight
@@ -135,18 +153,14 @@ Item {
                         }
 
                         Label {
-                            width: parent.width
+                            Layout.fillWidth: true
+                            Layout.fillHeight: true
+
                             text: currentRoom ? currentRoom.topic : ""
                             elide: Text.ElideRight
                             wrapMode: Text.NoWrap
                         }
                     }
-
-                    ToolButton {
-                        contentItem: MaterialIcon { icon: "\ue5d2" }
-
-                        onClicked: roomDrawer.open()
-                    }
                 }
             }
 

qml/form/RoomListForm.qml

@@ -226,5 +226,5 @@ Item {
         }
     }
 
-    onCurrentRoomChanged: if (currentRoom && !currentRoom.timelineSize) currentRoom.getPreviousContent(20)
+    onCurrentRoomChanged: setting.lazyLoad && currentRoom && !currentRoom.timelineSize ? currentRoom.getPreviousContent(20) : {}
 }

qml/form/SettingGeneralForm.qml

@@ -0,0 +1,13 @@
+import QtQuick 2.9
+import QtQuick.Controls 2.2
+
+Page {
+    property alias lazyLoad: lazyLoadSwitch.checked
+
+    Column {
+        Switch {
+            id: lazyLoadSwitch
+            text: "Lazy Load at Initial Sync"
+        }
+    }
+}