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wow, thank you @chrisclayton @mercime

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i mean disable nested comments for comments in Activity streams.

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i mean not “change the default avatar”, but when a user use default avatar, i want the delete avatar link disappear.

because the fact is when user do not upload any avatar and the default avatar appear but delete link is not disappear. its weird if i am the user, because i do not upload any avatar but there are a link to delete avatar in change avatar page

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any help?

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In user’s profile page, there are a menu activity, profile,setting,groups, how to add a new menu like that ?
And when I click profile, it will show public,edit, and change avatar tab, how to add a new tab ?
And how to customize them (default navigation and tabs) ?