Fix issue with old database entries and new graph page parsing

Fix critical issue with upgrade script

Fix setting custom graph colors

Fix issue with changing ownership of SSL certificates during install (k…

…izniche#240)

v5.0.23 Release

 - Fix inability to display Sensor page if unable to detect DS18B20 s…

…ensors (kizniche#236)

v5.0.21: Fix BMP280 sensor module initialization (kizniche#233), fix …

…saving and display of PID and Relay values on LCDs.

v5.0.20: Fix inability to select certain measurements for a sensor un…

…der the PID options

update version for release

Add BMP280 I2C temperature and pressure sensor (kizniche#233)