Merge pull request #6565 from Mieju/RTC-UserMenu-Alignment

fixed UserMenu alignment

Author: jtpio

packages/application-extension/style/base.css

@@ -16,3 +16,10 @@
 .jp-Toolbar > .jp-Toolbar-item {
   height: unset;
 }
+
+#jp-UserMenu {
+  flex: 0 0 auto;
+  display: flex;
+  text-align: center;
+  margin-top: 8px;
+}