add an overlay feedback

htdocs/css/admin.css

@@ -163,4 +163,14 @@ h1 {
 
 .device-log-messages {
     max-height: 500px;
+}
+
+.overlay {
+    position: fixed;
+    width: 100%;
+    height: 100%;
+    top: 0;
+    left: 0;
+    background-color: rgba(0, 0, 0, .5);
+    display: none;
 }

htdocs/lib/settings/ProfileList.js

@@ -18,6 +18,7 @@ $.fn.profileList = function() {
         $profiles.find('a').attr('draggable', 'false');
         var $profileEl;
         var originalIndex;
+        var $spinner = $('.overlay-spinner');
 
         var moveProfile = function(profileId, index) {
             var url = $profileList.find('.device a').attr('href');
@@ -50,6 +51,8 @@ $.fn.profileList = function() {
             if (!isValidDrag(event)) return;
             var $target = $(event.target).closest('.profile');
             var index = $profileList.find('.profile').index($target);
+
+            $spinner.addClass('d-flex');
             moveProfile(event.originalEvent.dataTransfer.getData(dataType), index).done(function() {
                 // done
             }).fail(function() {
@@ -57,6 +60,7 @@ $.fn.profileList = function() {
                 $profileEl.remove().insertBefore($profileList.children().eq(originalIndex));
             }).always(function() {
                 $profileEl = undefined;
+                $spinner.removeClass('d-flex');
             });
         }).on('dragend', '.profile', function(event) {
             if (event.originalEvent.dataTransfer.dropEffect === 'none') {

owrx/controllers/settings/sdr.py

@@ -208,6 +208,11 @@ class SdrFormControllerWithModal(SdrFormController, metaclass=ABCMeta):
                     </div>
                 </div>
             </div>
+            <div class="overlay overlay-spinner justify-content-center align-items-center">
+                <div class="spinner-border" role="status">
+                    <span class="sr-only">Loading...</span>
+                </div>
+            </div>
         """.format(
             object_type=self.getModalObjectType(),
             confirm_url=self.getModalConfirmUrl(),