feat: add back button to annotation page

gemeinsamforschen/src/main/webapp/assets/css/annotationStyle.css

@@ -148,6 +148,10 @@ ol {
     float: right;
     margin: 20px;
 }
+.leftcontent-buttons-back {
+    float: left;
+    margin: 20px;
+}
 .leftcontent-text {
     overflow: scroll;
     white-space: pre-line;

gemeinsamforschen/src/main/webapp/assets/js/annotationScript.js

@@ -71,6 +71,13 @@ $(document).ready(function() {
         location.href="givefeedback.jsp?token=" + getUserTokenFromUrl();
     });
 
+    /**
+     * back button
+     */
+    $('#btnBack').click(function () {
+        location.href="project-student.jsp?token=" + getUserTokenFromUrl() + "&projectId=" + getQueryVariable("projectId");
+    });
+
     /**
      * validation of annotation create form inside the modal
      */

gemeinsamforschen/src/main/webapp/pages/annotation-document.jsp

@@ -52,8 +52,11 @@
                             <div class="leftcontent">
                                 <div class="leftcontent-text context-menu-one" id="documentText"></div>
                                 <div class="leftcontent-buttons">
+                                    <div class="leftcontent-buttons-back">
+                                        <button id="btnBack" type="button" class="btn btn-secondary">Zurück</button>
+                                    </div>
                                     <div class="leftcontent-buttons-next">
-                                        <button id="btnContinue" type="button" class="btn btn-secondary">Weiter</button>
+                                        <button id="btnContinue" type="button" class="btn btn-primary">Weiter</button>
                                     </div>
                                 </div>
                             </div>