IssueFix/May round 2 & Menu插件大强化

[DymoneLewis]

fix #2013 #1573 并中幅度优化菜单插件功能，大幅度优化菜单相关的文档和demo

二编：看了下diff，还是大强化吧

[changeset-bot[bot]]

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Latest commit: 1c82cc400572e05977f6864bda1667555091a470

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[wumail]

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