fix(menu): extra not work with submenu

[Sepush]

Signed-off-by: Sepush sepush@outlook.com

close #3390

[vercel]

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Name	Status	Preview	Updated
naive-ui	✅ Ready (Inspect)	Visit Preview	Jul 30, 2022 at 3:28PM (UTC)

[codecov]

Codecov Report

Merging #3397 (2f9dead) into main (72bd612) will not change coverage.
The diff coverage is n/a.

❗ Current head 2f9dead differs from pull request most recent head 75c79c2. Consider uploading reports for the commit 75c79c2 to get more accurate results

@@           Coverage Diff           @@
##             main    #3397   +/-   ##
=======================================
  Coverage   63.09%   63.09%           
=======================================
  Files        1050     1050           
  Lines       21791    21791           
  Branches     5666     5666           
=======================================
  Hits        13750    13750           
  Misses       6565     6565           
  Partials     1476     1476           

Impacted Files	Coverage Δ
src/menu/src/Submenu.tsx	72.22% <ø> (ø)

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