Big upheaval of how the reports system works

* There are now Reports and ReportRecords.
* Reports coordinate to what moderators see, and ReportRecords
  coordinate with the reports that are created by individual users.
* Reports keep track of the report reason and the creating user.
* ReportRecords keep track of the total weight and whether this report
  requires urgent attention or not.
* ReportRecord keeps track of its own weight and urgency because then we
  can sort by weight and urgency in the admin view.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/templates/admin/board/reportrecord/change_list.html

@@ -0,0 +1,13 @@
+{% extends "admin/change_list.html" %}
+{% block extrastyle %}
+{{ block.super }}
+<style>
+.field-post_body {
+    width: 100%;
+}
+.urgent {
+    background-color: var(--message-error-bg);
+    color: var(--error-fg);
+}
+</style>
+{% endblock extrastyle %}