[Twiz O'Meter] Update to firmware 1.70

I decided to release this firmware bacuase its main new feature is intended to be used with hot days.



I'm sorry you will find a short list of new features, but in this last time I'm working on three new Twizy projects (hoping someone will come to life), and so the free time is shorter than before.

What is new in firmware 1.70
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- added the possibility to invert the sign of A and kW value. A and kW icons will be inverted as well, after rebooting ToM.
- new temperature dependent charging control. You can set:
. - the charger temperature treshold which will gradualy reduce the charging current to cool down the charger
. - the temperature cool down margin for gradualy restore normal charging current
. - the highest admitted charger temperature which will cause charging to abort for preserving charger lifespan
. If eventualy setted a charging current limit, it will be respected by the temperature dependent charging control
- implemented a delay for switching off the output when setted as charger aux fan. Delay is automaticaly setted from 5 to 15 minutes, in function of the charger temperature (range: <40° / >50°)

Bug fixed:
========
- solved the problem which sometimes inhibits the exit from setup/alarm/condensed info pages
- wifi rescan after touching wifi/mqtt tray icons is now more reactive, but not yet perfect
- adapted the width of some text-boxes in the setup page to avoid text truncation (*)
- removed an artifact in the charging animation during SOC update

Known bugs:
==========
- Sometimes web server has some troubles to load. In this case, it's helpul to connect your Twiz o'meter to a Wi-Fi network (or to the hotspot of your phone, if your Wi-Fi network is out of range) before attempting to load the web server main page.

Special thanks goes to:
==================
Snorre, as usual, for his costant help and for his contribution of ideas
Sherlock and Maikt for testing the new features and reporting me the bugs found
Danne for the trace of temperature increase during a complete charging process

Updating procedure:
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To install the new fw you have to the Blackbox as explained in detail in ToM manual except for these further instructions:
- coming from 1.4 fw (and later), the Blackbox can be updated also via OTA, without flashing
- coming from previuous versions (1.3 or 1.2) you have to update before to 1.4 (or 1.45) fw version, following the specific instructions reported in 1.4 / 1.45 topic, and only then to 1.6 fw.

And please, once again, you have to strictly follow all the mentioned steps!!!

Have fun with ToM and.... stay cool!

(*) N.B.: Only this bug fixing requires the updating of the LCD.

Hi Fabio,

The installation of the update worked great.
Thank you !

LG Tom