Removing functionality from the update keys button

This makes the button do nothing but ultimately the issue is that the
buttons should automatically update the database through AJAX or
similar. This is a temporary fix so the Keys modal isn’t an outlier in
design and doesn’t cause an error.

CTFd/static/admin/js/chalboard.js

@@ -274,7 +274,7 @@ $('#submit-key').click(function (e) {
 
 $('#submit-keys').click(function (e) {
     e.preventDefault();
-    updatekeys()
+    $('#update-keys').modal('hide');
 });
 
 $('#submit-tags').click(function (e) {

CTFd/templates/admin/chals.html

@@ -103,6 +103,7 @@
         <div class="modal-dialog">
             <div class="modal-content">
                 <div class="modal-header">
+                    <button type="button" class="close" data-dismiss="modal">&times;</button>
                     <h3 class="chal-title text-center"></h3>
                 </div>
                 <div class="modal-body">
@@ -228,6 +229,7 @@
         <div class="modal-dialog">
             <div class="modal-content">
                 <div class="modal-header text-center">
+                    <button type="button" class="close" data-dismiss="modal">&times;</button>
                     <h3>Keys</h3>
                 </div>
                 <div class="modal-body">
@@ -250,6 +252,7 @@
         <div class="modal-dialog">
             <div class="modal-content">
                 <div class="modal-header text-center">
+                    <button type="button" class="close" data-dismiss="modal">&times;</button>
                     <h3>Files</h3>
                 </div>
                 <div class="modal-body">
@@ -276,6 +279,7 @@
         <div class="modal-dialog">
             <div class="modal-content">
                 <div class="modal-header text-center">
+                    <button type="button" class="close" data-dismiss="modal">&times;</button>
                     <h3>Tags</h3>
                 </div>
                 <div class="modal-body">