Feedback form improvements

Position now a simplified dropdown of position type. Some minor
HTML and text changes.

Author: Celeo

Diff for: vzdv-site/templates/changelog.jinja

@@ -20,6 +20,7 @@
     <div class="card-text">
       <ul>
         <li>Controller feedback form default controller fixed</li>
+        <li>Controller feedback form position made into a simplified dropdown, and some other textual changes</li>
       </ul>
     </div>
   </div>

Diff for: vzdv-site/templates/feedback.jinja

@@ -23,12 +23,20 @@
       </div>
       <div class="mb-3">
         <label for="position">Position</label>
-        <input type="text" class="form-control" id="position" name="position" required>
+        <select name="position" id="position" class="form-control" required>
+          <option value="" selected disabled>Select a position</option>
+          <option value="Center">Center</option>
+          <option value="Approach">Approach</option>
+          <option value="Departure">Departure</option>
+          <option value="Tower">Tower</option>
+          <option value="Ground">Ground</option>
+          <option value="Clearance Delivery">Clearance Delivery</option>
+        </select>
       </div>
       <div>
         <label for="rating">Rating</label>
         <select name="rating" id="rating" class="form-control" required>
-          <option disabled>Rating</option>
+          <option value="" selected disabled>Select a rating</option>
           <option value="excellent">Excellent</option>
           <option value="good">Good</option>
           <option value="fair">Fair</option>