Add ability to add new users to the permissions list and remove existing users

static/css/quay.css

@@ -23,6 +23,15 @@
   text-overflow: ellipsis;
 }
 
+
+.user-mini-listing {
+  margin: 2px;
+}
+
+.user-mini-listing i {
+  margin-right: 8px;
+}
+
 .editable i {
   opacity: 0.2;
   font-size: 85%;
@@ -230,6 +239,38 @@ p.editable:hover i {
   padding-right: 6px;
 }
 
+.delete-ui {
+  outline: none;
+}
+
+.delete-ui i {
+  cursor: pointer;
+  vertical-align: middle;
+}
+
+.delete-ui .delete-ui-button {
+  display: inline-block;
+  vertical-align: middle;
+  color: white;
+  width: 0px;
+  overflow: hidden;
+
+  cursor: pointer;
+
+  transition: width 500ms ease-in-out;
+}
+
+.delete-ui .delete-ui-button button {
+  padding: 4px;
+}
+
+.delete-ui:focus i {
+  visibility: hidden;
+}
+
+.delete-ui:focus .delete-ui-button {
+    width: 54px;
+}
 
 /* Overrides for typeahead to work with bootstrap 3. */