LCD not refreshed correctly with fw update

[KipK]

following this from @glynhudson : KipK/openevse-gui-v2#46

[KipK]

Seems there's something wrong in the lcd service on wifi side.
When lcd.display is called , the content get overwritten sometime by the main lcd loop without taking care of the display time value in the queue
Also when LCD_CLEAR_LINE | LCD_DISPLAY_NOW flags are set for booth lcd lines consecutively, first line doesn't get updated and stays frozen by main loop content ( i.e. "Zzz Sleeping zzZ" )

I've also got this issue while working on RFID part

I feel the bug with LCD_DISPLAY_NOW is in the void LcdTask::display(Message *msg, uint32_t flags) function

[KipK]

We should also add a scroll from left to right when the text overflows the 16 char

[jeremypoulter]

@KipK Can you give a more concrete example?

[KipK]

Got this while trying to fix KipK/openevse-gui-v2#46
Give a look to it, you will probably get the same issue I got.