Display colors for all hvac_modes in climate charts

Hi,

At the moment the climate chart shows a green shadow only when the AC is on mode COOL. It would be really cool (pun intended) to paint not only a green shadow when it’s cooling but, blue, red, etc according to the reported HVAC_MODES.

Example:

  • HVAC_MODE_OFF: white
  • HVAC_MODE_HEAT: red
  • HVAC_MODE_COOL: blue
  • HVAC_MODE_HEAT_COOL: magenta
  • HVAC_MODE_AUTO: green
  • HVAC_MODE_DRY: yellow
  • HVAC_MODE_FAN_ONLY: grey