Added keypad, fixed one crash bug and few more features for mobile version

modules/client_mobile/mobile.otui

@@ -13,3 +13,27 @@ UIWidget
     y: 0
     focusable: false
     phantom: true
+
+  UIWidget
+    id: keypad
+    size: 200 150
+    anchors.bottom: parent.bottom
+    anchors.right: parent.right
+    phantom: false
+    focusable: false
+    visible: false
+    background: #00000044
+    image-source: /images/game/mobile/keypad
+    image-fixed-ratio: true
+    image-rect: 25 0 150 150
+    
+    UIWidget
+      id: pointer
+      size: 49 49
+      anchors.verticalCenter: parent.verticalCenter
+      anchors.horizontalCenter: parent.horizontalCenter
+      image-source: /images/game/mobile/keypad_pointer
+      image-fixed-ratio: true
+      phantom: true
+      focusable: false
+