Feature: Report improvements (#6967) (#7000)

* Implement Assignment of Reports (#6967)

* Change translation of admin.report.comment.label to "Report Comment" for clarity

As we'll soon add the ability for reports to have comments on them, this clarification makes sense.

* Implement notes for Reports

This enables moderators to leave comments about a report whilst they work on it

* Fix display of report moderation notes

* Allow reports to be reopened / marked as unresolved

* Redirect to reports listing upon resolution of report

* Implement "resolve with note" functionality

* Add inverse relationship for report notes

* Remove additional database querying when loading report notes

* Fix tests for reports

* Fix localisations for report notes / reports

config/locales/en.yml

@@ -137,6 +137,7 @@ en:
       web: Web
     action_logs:
       actions:
+        assigned_to_self_report: "%{name} assigned report %{target} to themselves"
         confirm_user: "%{name} confirmed e-mail address of user %{target}"
         create_custom_emoji: "%{name} uploaded new emoji %{target}"
         create_domain_block: "%{name} blocked domain %{target}"
@@ -153,10 +154,12 @@ en:
         memorialize_account: "%{name} turned %{target}'s account into a memoriam page"
         promote_user: "%{name} promoted user %{target}"
         remove_avatar_user: "%{name} removed %{target}'s avatar"
+        reopen_report: "%{name} reopened report %{target}"
         reset_password_user: "%{name} reset password of user %{target}"
-        resolve_report: "%{name} dismissed report %{target}"
+        resolve_report: "%{name} resolved report %{target}"
         silence_account: "%{name} silenced %{target}'s account"
         suspend_account: "%{name} suspended %{target}'s account"
+        unassigned_report: "%{name} unassigned report %{target}"
         unsilence_account: "%{name} unsilenced %{target}'s account"
         unsuspend_account: "%{name} unsuspended %{target}'s account"
         update_custom_emoji: "%{name} updated emoji %{target}"
@@ -242,15 +245,26 @@ en:
         expired: Expired
         title: Filter
       title: Invites
+    report_notes:
+      created_msg: Moderation note successfully created!
+      destroyed_msg: Moderation note successfully destroyed!
     reports:
       action_taken_by: Action taken by
       are_you_sure: Are you sure?
+      assign_to_self: Assign to me
+      assigned: Assigned Moderator
       comment:
-        label: Comment
+        label: Report Comment
         none: None
       delete: Delete
       id: ID
       mark_as_resolved: Mark as resolved
+      mark_as_unresolved: Mark as unresolved
+      notes:
+        create: Add Note
+        create_and_resolve: Resolve with Note
+        delete: Delete
+        label: Notes
       nsfw:
         'false': Unhide media attachments
         'true': Hide media attachments
@@ -259,12 +273,16 @@ en:
       reported_account: Reported account
       reported_by: Reported by
       resolved: Resolved
+      resolved_msg: Report successfully resolved!
       silence_account: Silence account
       status: Status
+      statuses: Reported Toots
       suspend_account: Suspend account
       target: Target
       title: Reports
+      unassign: Unassign
       unresolved: Unresolved
+      updated_at: Updated
       view: View
     settings:
       activity_api_enabled: