Release v3.21.0

• IMPORTANT: Because of rate limits by Amazon I decided to remove the update of smart home device values in intervals because it seems to produce too much load in Skills and Amazon systems.
• (Apollon77) Optimizes loading of smart home device states
• (Apollon77) Fixed issue with enabling/disabling of Alarms in combination with non-default music for the alarm
• (Apollon77) Prevented that Timers or Alarms that are long in the future to trigger their trigger state too early
• (Apollon77) Fixed deleting own user Messages state
• (Apollon77) Already request Notification updates when history registered a Notification action and do not wait for Push info to come in