I know it's somewhat of a luxury feature, so I wouldn't rate this bug as urgent, yet:
In the user manager there's a tab "Limitations".
There I can CHANGE values to anything but zero, BUT ...
- values jump back to zero immediately after clicking "Save", so you can't see the changed value
- setting a value back to zero doesn't work (at least that zero doesn't arrive at the server)
I'm using Heidi 9.3.0.5024 (64 Bit) with mysqld Ver 5.6.26-log for Linux on x86_64 (on Gentoo)