Updates to the list view and error container

lms/static/sass/course/_staff_grading.scss

@@ -27,6 +27,14 @@ div.staff-grading {
         display: none;
     }
 
+    ul
+    {
+        li
+        {
+            margin: 16px 0px;
+        }
+    }
+
     .prompt-information-container,
     .submission-wrapper,
     .rubric-wrapper,
@@ -37,7 +45,9 @@ div.staff-grading {
     }
     .error-container
     {
-        background-color: $error-red;
+        background-color: #FFCCCC;
+        padding: 15px;
+        margin-left: 0px;
     }
     .ml-error-info-container,
     {

lms/templates/instructor/staff_grading.html

@@ -28,6 +28,12 @@
 <div class="ml-error-info-container">
 </div>
 <section class="problem-list-container">
+<h2>Instructions</h2>
+<div class="instructions">
+<p>This is the list of problems that current need to be graded in order to train the machine learning models. Each problem needs to be trained separately, and we have indicated the number of student submissions that need to be graded in order for a model to be generated. Any number of problems can be graded, not just the amount required to create the model.</p>
+</div>
+
+<h2>Problem List</h2>
     <ul class="problem-list">
     </ul>
 </section>
@@ -52,6 +58,9 @@
 
 </section>
 
+<div class="action-button">
+    <input type=button value="Submit" class="action-button" name="show" />
+</div>
 
 <section class="grading-wrapper">
 <h2>Grading</h2>