Clock-Timer: disabling a rule by unselecting all weekdays reenables all weekdays

[lumpidu]

Describe the bug
Disabling a rule by unselecting all weekdays reenables all weekdays.

Expected behavior
The rule should be disabled.

System information (please complete the following information):

• Node Version 1.2.4
• Node-Red Version: 2.3.1

Additional context
As a workaround to debug a rule, I need to uncomment the current month

[Hypnos3]

This is not a common way for disabling a rule.
It is a consciously wanted behavior that is chosen every day.

One way for disabling rules will be to add a condition which will never be true.

I will think about an other way for disable rules.

[Hypnos3]

implemented rule enable/disable in 2.0.3