fix redirect after post Project

src/views/project/Project_edit.vue

@@ -306,10 +306,11 @@ export default {
           .then((response) => {
             if (response && response.status === 201 && response.data) {
               //* send thumbnail after feature_type was created
-              if (this.fileToImport)
+              if (this.fileToImport.size > 0){
                 this.postProjectThumbnail(response.data.slug);
-            } else {
-              this.goBackNrefresh(response.data.slug);
+              }else {
+                this.goBackNrefresh(response.data.slug);
+              }
             }
           })
           .catch((error) => {