Add missing numeric value for "dislike" category

This is diverging behaviour from upstream and was fixed by me in [1]
already. It is working fine on queer.group and therefore now going to be
merged into this fork.

[1]: https://github.com/hometown-fork/hometown/pull/1321

app/javascript/mastodon/features/notifications/components/report.jsx

@@ -15,6 +15,7 @@ const messages = defineMessages({
   spam: { id: 'report_notification.categories.spam', defaultMessage: 'Spam' },
   legal: { id: 'report_notification.categories.legal', defaultMessage: 'Legal' },
   violation: { id: 'report_notification.categories.violation', defaultMessage: 'Rule violation' },
+  dislike: { id: 'report_notification.categories.dislike', defaultMessage: 'Dislike' },
 });
 
 class Report extends ImmutablePureComponent {

app/javascript/mastodon/features/report/category.jsx

@@ -45,6 +45,7 @@ class Category extends PureComponent {
     const { onNextStep, category } = this.props;
 
     switch(category) {
+    // Hometown: also send reports for "disliked" toots, it's quite unfair to do nothing in this case.
     case 'dislike':
       onNextStep('statuses');
       break;

app/models/report.rb

@@ -57,6 +57,7 @@ class Report < ApplicationRecord
     spam: 1_000,
     legal: 1_500,
     violation: 2_000,
+    dislike: 3_000,
   }
 
   before_validation :set_uri, only: :create