refactor: deduplicate selected-item bulk action dispatch (#279)

* refactor: deduplicate selected-item bulk action dispatch

Refs #279

Signed-off-by: Thomas Vincent <thomasvincent@gmail.com>

* fix(i18n): correct zh-CN.po format string errors

Fix fullwidth percent signs and missing format specifiers.

Signed-off-by: Thomas Vincent <thomasvincent@gmail.com>

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Signed-off-by: Thomas Vincent <thomasvincent@gmail.com>

Author: somethingwithproof