[Fixed Position] Add text color property

Add a property to the Fixed Position toolbar to set text
color, WTD-881.

platform/features/layout/src/FixedController.js

@@ -194,6 +194,7 @@ define(
                     y: Math.floor(position.y / gridSize[1]),
                     id: id,
                     stroke: "transparent",
+                    color: "#717171",
                     width: DEFAULT_DIMENSIONS[0],
                     height: DEFAULT_DIMENSIONS[1]
                 });