kcms/access Fix unintentional config changes
The signal handler onValueChanged in combination with inadequate bounds in the SpinBox element causes automatic and unprompted changes to the config. This commit fixes the part about the config being updated when the user didn't intend so.
The fact that the SpinBox bounds are not adequately sized for the values they hold, along with some other minor issues like the small stepSize and missing units in parts of the accessibility kcm, is another issue that should be looked into.