[api] Allow to resort attribute values

update_with_associations ignored values that were the same
after sorting, but this makes manual resorting impossible

src/api/app/models/attrib.rb

@@ -96,7 +96,7 @@ def update_with_associations(values = [], issues = [])
     end
 
     #--- update values ---#
-    if values.sort != self.values.map(&:value).sort
+    if values != self.values.map(&:value)
       logger.debug "Attrib.update_with_associations: Values for #{fullname} changed, updating."
       will_save = true
       self.values.delete_all

src/api/spec/models/attrib_spec.rb

@@ -101,6 +101,18 @@
         it { expect(subject).to be true }
         it { expect { subject }.to change { attribute.values.count }.by(1) }
       end
+
+      context 'values list' do
+        let(:values1) { ['blue', 'green'] }
+        let(:values2) { ['green', 'blue'] }
+
+        it 'resorts attribute values' do
+          expect(attribute.update_with_associations(values1, [])).to be true
+          expect(attribute.values.map(&:value)).to eq(values1)
+          expect(attribute.update_with_associations(values2, [])).to be true
+          expect(attribute.values.map(&:value)).to eq(values2)
+        end
+      end
     end
   end