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/Setting.qml

@@ -7,8 +7,10 @@ import "component"
 import "form"
 
 Page {
+    property alias lazyLoad: generalForm.lazyLoad
     property alias darkTheme: appearanceForm.darkTheme
     property alias miniMode: appearanceForm.miniMode
+
     property var connection
 
     SettingAccountForm {
@@ -16,6 +18,11 @@ Page {
         parent: null
     }
 
+    SettingGeneralForm {
+        id: generalForm
+        parent: null
+    }
+
     SettingAppearanceForm {
         id: appearanceForm
         parent: null
@@ -36,6 +43,13 @@ Page {
                 onClicked: pushToStack(accountForm)
             }
 
+            ItemDelegate {
+                Layout.fillWidth: true
+
+                text: "General"
+                onClicked: pushToStack(generalForm)
+            }
+
             ItemDelegate {
                 Layout.fillWidth: true