fixed table width for tables using tablesorter, fixes #1201

Closes #1201

Merge request studip/studip!714

resources/assets/javascripts/lib/table.js

@@ -41,7 +41,8 @@ function enhanceSortableTable(table) {
     $(table).tablesorter({
         headers: headers,
         sortLocaleCompare : true,
-        sortRestart: true
+        sortRestart: true,
+        widthFixed: false
     });
 }