[Frontend] Updated glyph defs and descriptions

#781
#187
Converted many glyph char defs to
their JSON unicode equivalents;
Updated descriptions for many domain
objects;

platform/features/pages/bundle.js

@@ -38,8 +38,8 @@ define([
                 {
                     "key": "example.page",
                     "name": "Web Page",
-                    "glyph": "ê",
-                    "description": "A component to display a web page or image with a valid URL. Can be added to a Display Layout.",
+                    "glyph": "\u00ea",
+                    "description": "Embed a web page or web-based image in a resizeable window component. Can be added to Display Layouts. Note that the URL being embedded must allow iframing.",
                     "features": [
                         "creation"
                     ],