vebus: MultiPlus II 2x120V device screen shows large negative current on AC-Out L2 when inverting

[vejpasop]

Bug introduced with Multi firmware version 504.

MultiPlus II device screen indication is wrong. Main screen display is good.

Note: Current value reporting was changed 540 in order to support the Quattro-II 2x120V

Todo:

• [x] Fix mk2-dbus
• [x] Fix VictronConnect
• [x] check/Fix VE.Bus Smart dongle