A simple script that installs a RMB Menu item "Recook This Node" which, when selected, recooks the current node. Works on all nodes, so is better and more reliable than bypass/unbypass.
NOTE: This script may fail on Windows if $HOME/houdini7.0/scripts does not exist.
To install, simply run File->Run Script... and select the script, and click Accept.
You will have to restart Houdini to see the change, but if it installed correctly, every node should have a Right Mouse menu "Recook This Node"