CHANGE: sorted .templ files + added css classes + added nav header

Backend/static/script.js

@@ -1,6 +1,6 @@
 function editDay(element, event, formId) {
   var form = element
-    .closest(".grid-cols-subgrid")
+    .closest(".grid-sub")
     .querySelector(".time-component > form");
   form.classList.toggle("edit");
   element.classList.toggle("edit");