TYPO3: Get content element UID in fluid template of plugin

Needed when linking to itself with an anchor.

In the plugin controller, assign the currentUid template variable to the view:

$this->view->assign('currentUid', $this->configurationManager->getContentObject()->data['uid']);

Then in the view use the currentUid to generate links:

<f:link.action action="form" section="{currentUid}">go!</f:link.action>

Taken from https://stackoverflow.com/a/54663152/282601