Steps to reproduce:
1. Go to Control Panel > Site templates: Add a new Site Template (ST1)
2. Select the import option of ST1 actions.
3. In the import pop-up, click in back icon (see go-back-import.png)
Result Yo go back to the Site template > Pages (admin) section. (see result-error.png)
Expected The pop-up is closed. Other option is to hide this icon in the pop-up because there already is a close icon in the top right corner of the popup.