Merge pull request #286 from DigitalSlideArchive/css-fix

Prevent side panels from having horizontal scrollbars.

Author: manthey

histomicsui/web_client/stylesheets/body/image.styl

@@ -25,6 +25,7 @@
 
   .h-panel-group-left
     overflow-y auto
+    overflow-x hidden
     width 300px
     margin-left 0
     padding-bottom 5px
@@ -39,6 +40,7 @@
 
   .h-panel-group-right
     overflow-y auto
+    overflow-x hidden
     width 300px
     right 0
     padding-bottom 5px