introduce color transitions

src/Group.vue

@@ -359,6 +359,10 @@ export default {
 </style>
 <style>
 
+.attendee-add .md-icon {
+    transition: color 0.5s ease;
+}
+
 .attendee-add .md-list-item-container {
     padding-left: 0px !important;
     margin-left: 0px;

src/IbtFooter.vue

@@ -25,6 +25,7 @@ export default {}
 
 #footer, #footer a {
     color: rgba(0, 0, 0, .40);
+    transition: color 0.5s ease;
 }
 
 #footer:hover, #footer:hover a {