add ui:set_folding_flag

utils.lua

@@ -11,3 +11,10 @@ function get_args_kv()
 
     return { keys, values }
 end
+
+function round(x, n)
+    local n = math.pow(10, n or 0)
+    local x = x * n
+    if x >= 0 then x = math.floor(x + 0.5) else x = math.ceil(x - 0.5) end
+    return x / n
+end