[Fixed Position] Begin adding color chooser

Begin adding choice of fill colors for box/text/telemetry
elements in a fixed position view, WTD-881.

platform/features/layout/bundle.json

@@ -84,6 +84,12 @@
                                             "key": "bottom"
                                         }
                                     ]
+                                },
+                                {
+                                    "property": "fill",
+                                    "glyph": "X",
+                                    "control": "textfield",
+                                    "inclusive": true
                                 }
                             ]
                         },

platform/features/layout/src/elements/ElementProxies.js

@@ -1,16 +1,16 @@
 /*global define*/
 
 define(
-    ['./TelemetryProxy', './ElementProxy', './LineProxy'],
-    function (TelemetryProxy, ElementProxy, LineProxy) {
+    ['./TelemetryProxy', './ElementProxy', './LineProxy', './BoxProxy', './TextProxy'],
+    function (TelemetryProxy, ElementProxy, LineProxy, BoxProxy, TextProxy) {
         "use strict";
 
         return {
             "fixed.telemetry": TelemetryProxy,
             "fixed.line": LineProxy,
-            "fixed.box": ElementProxy,
+            "fixed.box": BoxProxy,
             "fixed.image": ElementProxy,
-            "fixed.text": ElementProxy
+            "fixed.text": TextProxy
         };
     }
 );