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

Conflicts:
- `Gemfile.lock`:
  Not a real conflict, just a glitch-soc-only dependency too close to a
  dependency that got updated upstream. Updated as well.
- `app/models/status.rb`:
  Not a real conflict, just a change too close to glitch-soc-changed code
  for optionally showing boosts in public timelines.
  Applied upstream changes.
- `app/views/layouts/application.html.haml`:
  Upstream a new, static CSS file, conflict due to glitch-soc's theming
  system, include the file regardless of the theme.
- `config/initializers/content_security_policy.rb`:
  Upstream dropped 'unsafe-inline' from the 'style-src' directive, but
  both files are very different. Removed 'unsafe-inline' as well.

spec/controllers/settings/identity_proofs_controller_spec.rb

@@ -151,7 +151,7 @@ describe Settings::IdentityProofsController do
         @proof1 = Fabricate(:account_identity_proof, account: user.account)
         @proof2 = Fabricate(:account_identity_proof, account: user.account)
         allow_any_instance_of(AccountIdentityProof).to receive(:badge) { double(avatar_url: '', profile_url: '', proof_url: '') }
-        allow_any_instance_of(AccountIdentityProof).to receive(:refresh!) { }
+        allow_any_instance_of(AccountIdentityProof).to receive(:refresh!) {}
       end
 
       it 'has the first proof username on the page' do
@@ -165,4 +165,22 @@ describe Settings::IdentityProofsController do
       end
     end
   end
+
+  describe 'DELETE #destroy' do
+    before do
+      allow_any_instance_of(ProofProvider::Keybase::Verifier).to receive(:valid?) { true }
+      @proof1 = Fabricate(:account_identity_proof, account: user.account)
+      allow_any_instance_of(AccountIdentityProof).to receive(:badge) { double(avatar_url: '', profile_url: '', proof_url: '') }
+      allow_any_instance_of(AccountIdentityProof).to receive(:refresh!) {}
+      delete :destroy, params: { id: @proof1.id }
+    end
+
+    it 'redirects to :index' do
+      expect(response).to redirect_to settings_identity_proofs_path
+    end
+
+    it 'removes the proof' do
+      expect(AccountIdentityProof.where(id: @proof1.id).count).to eq 0
+    end
+  end
 end