[Mobile] Gestures

Added styling to back and selection
arrow (tree). Also increased the space
allowed for selection arrow on tree item.
Info Button created on grid items for mobile.
Info bubble appears on tablet like desktop.
Also on mobile, info bubble fits to width.
New QueryService that returns if on iPhone.
Also formatted dialog box so that their is no
margin and takes up fullscreen on mobile.

platform/commonUI/general/res/sass/mobile/overlay/_overlay.scss

@@ -0,0 +1,11 @@
+.overlay {
+    @include phoneandtablet {
+        $m: 0;
+        // Removes curved edges on the dialog box
+        // and makes it take up fullscreen
+        >.holder {
+          @include border-radius($m);
+          top: $m; right: $m; bottom: $m; left: $m;
+        }
+    }
+}