LT-361: Add borders to viewport and active viewport

LesionTracker/client/components/viewerSection/viewerSection.styl

@@ -30,9 +30,11 @@
     margin-left: - $studiesSidebarMenuWidth
     max-width: $studiesSidebarMenuWidth
     order: 1
+    display: none
 
     &.sidebar-open
       margin-left: 0
+      display: block
 
   .mainContent
     flex: 1
@@ -50,6 +52,7 @@
     order: 3
     padding-left: 6px
     position: relative
+    display: none
 
     &[data-timepoints="3"]
       margin-right: - ($lesionsSidebarMenuWidth + 135.5px)
@@ -59,18 +62,9 @@
       margin-right: - ($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
+      display: block
 
   .studiesListedChanger
     theme('border-bottom', '%s solid $uiBorderColor' % $uiBorderThickness)