feat: 优化矩阵显示

- 解决打开矩阵的时候字体太长会自动换行的问题
- title 和 下面的选项对齐

src/views/Design/components/Questions/MatrixCheckbox.vue

@@ -3,18 +3,22 @@
     <el-table-column width="140">
       <template #header></template>
       <template #default="{ row /*, column, $index*/ }">
-        <contenteditable v-model="row.option" :active="active" @blur="emitValue" />
+        <el-text truncated>
+          <contenteditable v-model="row.option" :active="active" @blur="emitValue" />
+        </el-text>
       </template>
     </el-table-column>
     <el-table-column v-for="(col, colIndex) in cols" :key="col.option" width="100">
       <template #header>
-        <contenteditable
-          v-if="col.option"
-          v-model="col.option"
-          :active="active"
-          @blur="emitValue"
-        />
-        <van-field v-else v-model="col.option" placeholder="请输入"></van-field>
+        <el-text truncated>
+          <contenteditable
+            v-if="col.option"
+            v-model="col.option"
+            :active="active"
+            @blur="emitValue"
+          />
+          <van-field v-else v-model="col.option" placeholder="请输入"></van-field>
+        </el-text>
       </template>
       <template #default="{ /*row, column, */ $index: rowIndex }">
         <input