fix(v3): call onShow when switchTab from a non-tabBar page to an existing tabBar page https://ask.dcloud.net.cn/question/90871

# Conflicts:
#	src/platforms/app-plus/service/framework/app.js

# Conflicts:
#	packages/uni-cli-shared/lib/manifest.js

优化了 indexOf/substr 的写法，使用 startsWith/endsWith 更加语义化