Bugfix, trivial: do not visit 9 on first digit for setpoint When editing a setpoint, and hitting the "-" button, the digit sequence was 1, 0, 9, 1, ... So, one could enter a setpoint of 9.5 bar (that is later automatically clamped between 0.5 and 1.6). This simply looks strange, so fix it. Now, hitting "+" and "-" behave symmetrical. At the same time, kick out some unused code. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>