Per-user reblog hiding implementation/fixes/tests

Note that this will only hide/show *future* reblogs by a user, and does
nothing to remove/add reblogs that are already in the timeline. I don't
think that's a particularly confusing behavior, and it's a lot easier
to implement (similar to mutes, I believe).

spec/models/concerns/account_interactions_spec.rb

@@ -37,4 +37,41 @@ describe AccountInteractions do
       end
     end
   end
+
+  describe 'ignoring reblogs from an account' do
+    before do
+      @me = Fabricate(:account, username: 'Me')
+      @you = Fabricate(:account, username: 'You')
+    end
+
+    context 'with the reblogs option unspecified' do
+      before do
+        @me.follow!(@you)
+      end
+
+      it 'defaults to showing reblogs' do
+        expect(@me.muting_reblogs?(@you)).to be(false)
+      end
+    end
+
+    context 'with the reblogs option set to false' do
+      before do
+        @me.follow!(@you, reblogs: false)
+      end
+
+      it 'does mute reblogs' do
+        expect(@me.muting_reblogs?(@you)).to be(true)
+      end
+    end
+
+    context 'with the reblogs option set to true' do
+      before do
+        @me.follow!(@you, reblogs: true)
+      end
+
+      it 'does not mute reblogs' do
+        expect(@me.muting_reblogs?(@you)).to be(false)
+      end
+    end
+  end
 end