Release v2.3.5

• Fixed state class on HA tariff threshold sensors
• Fixed mixup on date interval for price configuration
• Fixed value for last month kwh
• Fixed missing GUI widgets if voltage is not reported by meter
• Fixed crowded axis labels on amperage graph
• Fixed data enable for Kamstrup with P1 output configured
• Added option to send MQTT on interval
• Added export price in the export gauge
• Improved visibility of axis information on graphs
• General code improvements