When using the V3 template to edit label lines for category content, it ignores attempts to save empty lines, instead reverting them to whatever they previously contained.
Reproduction steps:
Do a fresh V3 template install
Edit the content for the Rules tab
Populate one of the included empty text lines in the example
Close, save, and reopen the text editor
Erase the content of the previously edited line
Close, save, and, reopen the text editor
Expected result: Empty line committed
Actual result: Line reverts to previous contents