Add join room/create room/create direct chat && small bug fixes.

qml/form/SettingAppearanceForm.qml

@@ -0,0 +1,19 @@
+import QtQuick 2.9
+import QtQuick.Controls 2.2
+
+Page {
+    property alias darkTheme: themeSwitch.checked
+    property alias miniMode: miniModeSwitch.checked
+
+    Column {
+        Switch {
+            id: themeSwitch
+            text: "Dark theme"
+        }
+
+        Switch {
+            id: miniModeSwitch
+            text: "Mini Room List"
+        }
+    }
+}