ask for confirmation when deleting an external storage

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/files_external/js/settings.js

@@ -1129,6 +1129,11 @@ MountConfigListView.prototype = _.extend({
 			return;
 		}
 		var storage = new this._storageConfigClass(configId);
+
+		OC.dialogs.confirm(t('files_external', 'Are you sure you want to delete this external storage', {
+				storage: this.mountPoint
+			}), t('files_external', 'Delete storage?'), function(confirm) {
+			if (confirm) {
 				this.updateStatus($tr, StorageConfig.Status.IN_PROGRESS);
 
 				storage.destroy({
@@ -1139,6 +1144,8 @@ MountConfigListView.prototype = _.extend({
 						self.updateStatus($tr, StorageConfig.Status.ERROR);
 					}
 				});
+			}
+		});
 	},
 
 	/**