✨ Add the undefied option to props schema enums

frontend/src/app/main/ui/ds/foundations/assets/icon.cljs

@@ -282,7 +282,7 @@
    [:class {:optional true} :string]
    [:id [:and :string [:fn #(contains? icon-list %)]]]
    [:size  {:optional true}
-    [:enum "s" "m"]]])
+    [:maybe [:enum "s" "m"]]]])
 
 (mf/defc icon*
   {::mf/props :obj

frontend/src/app/main/ui/ds/layout/tab_switcher.cljs

@@ -114,7 +114,7 @@
    [:selected {:optional true} :string]
    [:action-button {:optional true} some?]
    [:action-button-position {:optional true}
-    [:enum "start" "end"]]])
+    [:maybe [:enum "start" "end"]]]])
 
 (mf/defc tab-switcher*
   {::mf/props :obj

frontend/src/app/main/ui/ds/notifications/toast.cljs

@@ -24,7 +24,7 @@
   [:map
    [:class {:optional true} :string]
    [:level {:optional true}
-    [:enum "info" "warning" "error" "success"]]
+    [:maybe [:enum "info" "warning" "error" "success"]]]
    [:on-close {:optional true} fn?]])
 
 (mf/defc toast*