[#76287116] fix issue to the problem with delete_then_add_back to agent list
Revert "[#79018378] change default_locale as tags when in tags locale, after translation, restore prev default_locale"

This reverts commit ae316909151750ef8ceda415644a8cd124daab2c.
Revert "[#79018378] returning translation tags as default if no match is found, when I18n.t is being used in models"

This reverts commit 254cf6311ed15d70e858a11cd20c5178ef258afd.
Revert "[#79110132] first try to support displaying translation tags being used in helpers"

This reverts commit 7b290624a0b40aa4799517e16d1f732403f26799.