FEATURE: Only approved flags for post counters
* Why was this change necessary?
The counters for flagged posts in the user's profile and user index from
the admin view include flags that were rejected, ignored or pending
review. This introduces unnecessary noise. Also the flagged posts
counter in the user's profile includes custom flags which add further
noise to this signal.
* How does it address the problem?
* Modifying User#flags_received_count to return posts with only approved
standard flags
* Refactoring User#number_of_flagged_posts to alias to
User#flags_received_count
* Updating the flagged post staff counter hyperlink to navigate to a
filtered view of that user's approved flagged posts to maintain
consistency with the counter
* Adding system tests for the profile page to cover the flagged posts
staff counter
* Why was this change necessary?
The current logic in the user.hbs template file does not render the
trust level element for the user's info panel when the user is TL0,
because 0 is treated as falsey in the `if` conditional block.
Ref: https://meta.discourse.org/t/tl0-not-displayed-on-users-profile-pages/271779/10
* How does it address the problem?
This PR adds a predicate helper method local to the user controller that
includes an additional check which returns true if the trust_level of
the user is 0 on top of the existing logic. This allows TL0 users to
have their trust level rendered correctly in their profile's info panel.
