[Shutter] Fix PowerON

[SteWers]

Description:

I have on some devices, not on all, the problem, that both shutter relais are switches on after power on. This doesn't happen after a software restart. This PR fixes the problem.
@stefanbode: Please have a look at it, if I did it the right way.

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.0.241117
• I accept the CLA.

[stefanbode]

Let’s keep this on hold. Here you disable the power switch on restart. May be a good idea if shutters defined and a shutter relay but should not kick in in any other situation. I do not understand why this happens NOW. It was not an issue the last 5 years.

[SteWers]

I think, that this happens since a few month. After a power outage, I recognised it, but I thought it was caused by my hardware module. While testing the UI fix I saw this on the test device (D1 mini with only a shutter configured). On other devices it does not happen. Very crazy. Will do some further tests.