Update Eve delay sliders

Bugs

• Log level setting did not work, corrected.

Enhancements

• Changed Eve delay parameters from seconds to separate hours, minutes and seconds.
• Changed Eve minimum delay parameter from seconds to percentage of maximum delay. None of these changes affects the configuration file.
• Possibility to use as stateful switch. (Part of #6)
• Added small delay before initialising the switch timer, to allow change of values in scenes that trigger the switch.