Category or Tag filter for Popular/Recent/Unread page

[Nguyễn Bảo]

Hi all,

On Unread Topic list, We can filter by Categories

It will be better that User can filter by Category or Tag when surfing Popular/Recent/Unread too.

For example: I want to find Popular post of Nodebb Plugin Category.

Same feature here: https://github.com/discourse/discourse/wiki/Basic-Usage-Guide

[Nguyễn Bảo]

Update for Unread List. (Can filter by Category)