Assign null to all undefined (missing values) (frontend)

[hlngo]

• Economizer

• AirRCX

• Hotwater

• Zone

• Scc apps

[hlngo]

Assigned to economizer already. Do similar things for AirRCx, HotwaterRCx, Zone, Scc apps

[hlngo]

Change all functions to use filterAndMapData(Ex) before adding a serie