This is the third time I by accident hit "z" - and with horror in my eyes watched a line disappear. Well - it was the second time, but then I tried shift-z ... desperately hoping that it would REDO my last action. Nope - another added todo line gone down the drain ..... ugh!

Therefore: I really need to:

1. Disable the life threatening z-shortcut key
2. Be able to redo an undone action

Puhlease!