refactor: style tweaks and bug fixes

- italic and bold for rundown metadata entries
- allow deleting groups
- make groups in order
- correct style for milestones
- open playing groups
- style tweaks

apps/client/src/common/components/link/external-link/ExternalLink.module.scss

@@ -7,6 +7,7 @@
   transition-property: color;
   transition-duration: $transition-time-action;
   width: fit-content;
+  text-decoration: none;
 
   &.inline {
     display: inline-flex;
@@ -20,4 +21,4 @@
     outline: none; 
     box-shadow: 0 1px 0 0 currentColor;
   }
-}
+}