Simple one class plugin to allow signs to be edited by
right-clicking it (while main hand empty + offhand not holding any dye item).
Only works if you have permission to place blocks at that location. (If BlockPlaceEvent is not cancelled)
There is a permission
editablesigns.use that is true by default
There is also a command
/editablesigns reload with the permission
editablesigns.reload which does what you think it does
(Tho not tested, should in theory work on 1.8 - 1.16 as well)