Forces the width of the minimap wrapper

It allow children of the wrapper to know the width of the display at
any time.

Author: abe33

lib/minimap-view.coffee

@@ -142,6 +142,8 @@ class MinimapView extends View
     evw = editorViewRect.width
     evh = editorViewRect.height
 
+    @miniWrapper.css {width}
+
     # VisibleArea's size
     @miniVisibleArea.css
       width : @indicator.width  = width

stylesheets/minimap.less

@@ -51,6 +51,7 @@
   .minimap-editor {
     position: absolute;
     cursor: default;
+    width: 100%;
     .accelerated;
     .scroll-view {
       .accelerated;