ITSTYR-63: Add affix and styling.

public/styles.css

@@ -153,3 +153,10 @@ body.list table tbody td.dashboard--table-answer {
   margin-top: 2em;
   margin-bottom: 2em;
 }
+
+
+/* Fix position of table heads while scrolling */
+.affix {
+    top: 0;
+    z-index: 1040;
+}

templates/easy_admin_overrides/list.html.twig

@@ -128,5 +128,24 @@
               });
           }
       }, false);
+
+      // Function for setting static size on table heads. We need to do this to keep the same width as the table when setting the theads position to fixed.
+      // One could argue that we should use position sticky instead. But since we manipulate overflow on thead parents that can't be done.
+      function setTheadSize() {
+          // Set width of thaed
+        $("table thead").each(function() {
+            $(this).width($(this).width());
+        });
+        // Set the with of the column headers in thead
+        $("table thead th").each(function() {
+            $(this).width($(this).width());
+        });
+        // Affix table header when this reaches upper borwser edge.
+        $('table thead').affix({
+            offset: 0
+        })
+      }
+      window.addEventListener('resize', setTheadSize);
+      setTheadSize();
   </script>
 {% endblock %}