1、Form表单字段配置属性colFirst修改为firstCol。

2、修复Form表单元素放在第一列时colSpan无效问题。

io.sc.platform.core.frontend/src/platform/components/form/WForm.vue

@@ -164,9 +164,13 @@ const formLayoutStyleComputed = computed(() => {
 const fieldStyleComputed = (field) => {
   const style = {};
   if (field) {
-    if (field.colFirst) {
-      // col-start-1
+    if (field.firstCol) {
       style['grid-column-start'] = 1;
+      if (field.colSpan === 'full' || (typeof field.colSpan === 'number' && screenColsNumComputed.value < field.colSpan)) {
+        style['grid-column-end'] = `${screenColsNumComputed.value + 1}`;
+      } else if (typeof field.colSpan === 'number' && field.colSpan > 0) {
+        style['grid-column-end'] = `${field.colSpan + 1}`;
+      }
     } else {
       if (field.colSpan === 'full') {
         // col-span-${screenColsNumComputed.value}