Move ratioDefault option from the Rezie command to image component

src/commands/view/Resize.js

@@ -6,7 +6,6 @@ module.exports = {
     var canvasResizer = this.canvasResizer;
     var options = opt.options || {};
     var canvasView = canvas.getCanvasView();
-    options.ratioDefault = 1;
     options.appendTo = canvas.getResizerEl();
     options.prefix = editor.getConfig().stylePrefix;
     options.posFetcher = canvasView.getElementPos.bind(canvasView);

src/dom_components/model/ComponentImage.js

@@ -11,7 +11,7 @@ module.exports = Component.extend(
       droppable: 0,
       editable: 1,
       highlightable: 0,
-      resizable: 1,
+      resizable: { ratioDefault: 1 },
       traits: ['alt'],
 
       // File to load asynchronously once the model is rendered