Update frame style

src/canvas/view/FrameView.js

@@ -25,9 +25,6 @@ function(Backbone) {
     },
 
     render: function() {
-      this.$el.attr({
-        style: 'width: 50%; display: block; height: 80%; border: medium none; margin: 0 auto 0; background-color: white',
-      });
       this.$el.attr({class: this.ppfx + 'frame'});
       return this;
     },

styles/css/main.css

@@ -2644,7 +2644,9 @@ See http://bgrins.github.io/spectrum/themes/ for instructions.
     height: 100%;
     outline: medium none;
     width: 100%;
-    border: none; }
+    border: none;
+    margin: 0 auto;
+    display: block; }
   .wte-cv-canvas .wte-ghost {
     display: none;
     pointer-events: none;

styles/scss/main.scss

@@ -132,6 +132,8 @@ $imageCompDim:	50px;
     outline: medium none;
     width: 100%;
     border: none;
+    margin: 0 auto;
+    display: block;
   }
 
   .#{$app-prefix}ghost{