fix: 解决矩阵问题

- 解决矩阵某些情况下无法点击的问题

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

@@ -9,7 +9,7 @@
           </el-text>
           <van-popover
             v-model="row.showAction"
-            placement="right"
+            placement="left-end"
             trigger="click"
             :actions="popoverActions"
             @select="handleActionSelect($event, row, 'row')"
@@ -31,7 +31,7 @@
           </el-text>
           <van-popover
             v-model="col.showAction"
-            placement="right"
+            placement="left-end"
             trigger="click"
             :actions="popoverActions"
             @select="handleActionSelect($event, col, 'col')"
@@ -196,8 +196,8 @@ const emitValue = (/* val: unknown */) => {
 
 .icon {
   position: absolute;
-  top: 0;
-  right: -5px;
+  top: 3px;
+  right: -10px;
 
   & > svg {
     height: 15px;