enhance: j jump to a property key or value (selection mode)

We can support jump to any block in the future.
More enhancements need to be done including:
1. still focus on the block or property key/value after any property
operation
2. up/down/left/right support maybe?

src/main/frontend/components/select.cljs

@@ -150,7 +150,8 @@
     (when (fn? tap-*input-val)
       (tap-*input-val input))
     [:div.cp__select
-     (merge {:class "cp__select-main"} host-opts)
+     (merge {:class "cp__select-main"}
+            host-opts)
 
      (if dropdown?
        (ui/dropdown