Adds hotkeys to zoom without limits in either direction*.
Default hotkeys are 'CTRL + K' and 'CTRL + L'
For additional info please see the forum post https://forums.factorio.com/viewtopic.php?f=92&t=42519
Please keep the bug reports in the forum post as well.
Thank you, enjoy.
*Had to add some limits as the game starts behaving strangely once you push it far enough.