Have inner image-container consume entire area

src/app/image-view.coffee

@@ -10,7 +10,8 @@ class ImageView extends ScrollView
 
   @content: ->
     @div class: 'image-view', tabindex: -1, =>
-      @img outlet: 'image'
+      @div class: 'image-container', =>
+        @img outlet: 'image'
 
   initialize: (imageEditSession) ->
     super

static/image-view.less

@@ -1,9 +1,14 @@
 .image-view {
-  height:100%;
-  width: 100%;
   margin: 0;
   padding: 0;
   overflow: auto;
+  position: relative;
+  display: -webkit-flex;
+
+  .image-container {
+    height:100%;
+    width: 100%;
+  }
 
   img {
     box-sizing: content-box;