-enable-panels flag mentioned in windows.create() does not exist

[jobisoft]

In the description of windows.create() https://thunderbird-webextensions.readthedocs.io/en/latest/windows.html#create-createdata

there is a -enable-panels flag, that does not seem to exists. See Philipps comment here: https://thunderbird.topicbox.com/groups/addons/Td610c189d5ae03e3-M35e88ef1f820f3e4623a52df/how-to-enable-enablepanels-flag