Merge branch 'dev-mvp-20200331' of 192.168.110.53:com.pica.cloud.education.frontend/pica.cloud.web-education-admin into dev-mvp-20200331

* 'dev-mvp-20200331' of 192.168.110.53:com.pica.cloud.education.frontend/pica.cloud.web-education-admin:
  修复选择范围按钮的删除
  增加模板项目预览和上架后的禁止选择