Styling fixes for tabs, collapsible search box, navbar updates

Packages/viewerbase/components/studyBrowser/studyBrowser/studyBrowser.styl

@@ -3,6 +3,7 @@
   height: 100%
   width: 100%
   min-width: 120px
-  overflow: auto
+  overflow-y: auto
+  overflow-x: hidden
   background-color: black
   padding-bottom: 20px

Packages/viewerbase/components/studyBrowser/thumbnailEntry/thumbnailEntry.styl

@@ -4,6 +4,9 @@
   background-color: black
   border: 1px solid #424242
   margin: 0 auto
+  cursor: copy
+  cursor: -webkit-grab
+  cursor: -moz-grab
   
   .seriesDescription
     text-align: center