Fixing hidden measurements table header on IE11

OHIFViewer/client/components/flexboxLayout/flexboxLayout.styl

@@ -18,7 +18,8 @@ $lesionsSidebarMenuWidth = 450px
 
     .sidebar-option
       height: 100%
-      position: fixed
+      max-width: inherit
+      position: absolute
       transform(translateX(100%))
       transition($sidebarTransition)
       width: 100%
@@ -59,16 +60,6 @@ $lesionsSidebarMenuWidth = 450px
       margin-right: - ($lesionsSidebarMenuWidth + 270px)
       max-width: $lesionsSidebarMenuWidth + 270px
 
-    &:before
-      theme('background-color', '$uiBorderColor')
-      content: ''
-      display: block
-      height: 100%
-      left: 5px
-      position: absolute
-      top: 0
-      width: $uiBorderThickness
-
     &.sidebar-open
       margin-right: 0