Merge branch 'iteration_0802' into test

src/views/accompaniment/modals/form.vue

@@ -91,7 +91,7 @@
               label="声部"
             >
             <!-- :rules="[{required: true, message: '请选择声部'}]" -->
-              <el-select style="width: 100%!important;" v-model="song.subjectId" placeholder="请选择声部">
+              <el-select style="width: 100%!important;" v-model="song.subjectId" clearable placeholder="请选择声部">
                 <el-option
                   v-for="item in selects.subjects"
                   :value="item.id"