The Kunena team has announce the arrival of Kunena 5.1.18 [K 5.1.18] which is now available for download as a native Joomla extension for J! 3.9.x. This version addresses most of the issues that were discovered in K 5.1 and issues discovered during the development stages of K 5.1.
I have the poll feature enabled and have read the instructions. However, the editor menu is not showing the colored bars that is the icon for the polls. I thought it was an issue with the template I was using but when I change to the default template I actually get nothing in the editor options. See attached editor window. One with and one custom template and one with the default template.