feat:处理创建直播课和创建视频课的间距

src/modules/course-manage/AddLive.less

 .add-live-page {
+  position:relative;
   .box {
     margin-bottom: 66px !important;
   }

src/modules/course-manage/video-course/AddVideoCourse.less

 .add-video-course-page {
+  position:relative;
   .box{
-    margin-bottom:16px !important;
+    margin-bottom:66px !important;
   }
   .ant-radio-group {
     display: flex;

src/modules/course-manage/video-course/modal/WatchDataModal.jsx

@@ -20,7 +20,7 @@ class WatchDataModal extends React.Component {
     this.state = {
       visible:true,
       dataSource:[],
-      size:10,
+      size:1,
       query: {
         current: 1,
       },
@@ -129,7 +129,7 @@ class WatchDataModal extends React.Component {
           maskClosable={false}
           className="watch-data-modal"
           closable={true}
-          width={720}
+          width={800}
         >
           <div className="search-container">
             <Search placeholder="搜索用户姓名/手机号"  style={{ width: 200 }}  onChange={(e) => { this.handleChangNickname(e.target.value)}}  onSearch={ () => { this.handleFetchDataList()}} />