Fixed an issue with the css for the table-wrapper class

The section that uses this class was not working properly due to the
missing overflow-y: scroll statement.

The idea was to only show 3 of the uploaded files at a time, when the overflow statement was missing
the other uploaded files where bleeding through and over the transcribed files section.

This should fix that issue so that the uploaded file section does not bleed over the transcribed section content.

src/main/resources/static/css/styles.css

@@ -35,6 +35,7 @@
 
 .table-wrapper {
     max-height: 160px;
+    overflow-y: scroll;
 }
 
 .table thead th {