Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- `app/models/form/admin_settings.rb`:
  New setting added upstream. Ported it.
- `app/views/statuses/_simple_status.html.haml`:
  Upstream removed RTL classes. Did the same.
- `config/settings.yml`:
  New setting added upstream. Ported it.

spec/helpers/statuses_helper_spec.rb

@@ -149,22 +149,4 @@ RSpec.describe StatusesHelper, type: :helper do
       expect(css_class).to eq 'h-cite'
     end
   end
-
-  describe '#rtl?' do
-    it 'is false if text is empty' do
-      expect(helper).not_to be_rtl ''
-    end
-
-    it 'is false if there are no right to left characters' do
-      expect(helper).not_to be_rtl 'hello world'
-    end
-
-    it 'is false if right to left characters are fewer than 1/3 of total text' do
-      expect(helper).not_to be_rtl 'hello ݟ world'
-    end
-
-    it 'is true if right to left characters are greater than 1/3 of total text' do
-      expect(helper).to be_rtl 'aaݟaaݟ'
-    end
-  end
 end