Enforce allowed filesize and type in extra var upload form

modules/extravar/skins/default/assets/file_upload.js

@@ -11,6 +11,15 @@
 		});
 		$('input.rx_ev_file').on('change', function() {
 			const container = $(this).parents('.ev_file_upload');
+			const max_size = parseInt($(this).data('allowedFilesize'), 10);
+			const file_count = this.files.length;
+			for (let i = 0; i < file_count; i++) {
+				if (max_size && this.files[i].size > max_size) {
+					alert($(this).data('msgFilesize'));
+					$(this).val('');
+					return;
+				}
+			}
 			container.find('input[type=hidden][name^=_delete_]').val('N');
 		});
 	});