add hidden field to job application form

layouts/partials/script-footer.html

@@ -6,9 +6,11 @@
 <script type="text/javascript">
   function openApplyForm(title) {
     let titleh3 = document.getElementById("title-h3")
+    let jobInput = document.getElementById("jobInput")
     let form = document.getElementById("apply-form")
     
     titleh3.innerHTML = title
+    jobInput.value = title
     form.classList.remove('invisible')
     
   }

layouts/shortcodes/jobs.html

@@ -9,6 +9,7 @@
       <div class="close-btn" onclick="closeApplyForm()"></div>
       <div class="supertitle">Your application as:</div>
       <h3 id="title-h3" class="title"></h3>
+      <input class="invisible" type="text" name="job" id="jobInput">
       <p class="lead">Great, you've made the first step. We look forward to your application</p>
       <div class="apply-row">
         <div class="apply-section -contact">