Your new screenshot is of Jira now, but it's the bit you "knew how to modify". So what is the question?
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For Jira, admin -> General configuration - lets you change the text for the gadget.
However, I'm confused, as your screenshot is for Confluence, and identical to your other question https://answers.atlassian.com/questions/155710/how-to-hide-thest-tabs-on-confluence-dashboard-for-anonymouse-or-all-user
Is there a reason this isn't a duplicate?
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