Update the display order of the elements of the UI

The pages display the graph at the top instead at the bottom.

Also added some css to improve the look of the UI

mobile/www/css/index.css

@@ -1,4 +1,13 @@
+.no-select {
+    -webkit-user-select: none; /* safari */
+    -ms-user-select: none; /* IE 10+ and Edge */
+    user-select: none; /* standard syntax */
+}
+
 .img-character {
+    display: block;
+    margin-left: auto;
+    margin-right: auto;
     width: 256px;
     height: 256px;
 }
@@ -6,5 +15,9 @@
 #table-classes-content > tr > td {
     text-align: center;
     display: block !important;
-    padding-top: 1%;
+    padding-top: 3.7%;
+}
+
+.data-table-title {
+    text-align: center;
 }