bugfix: replace oappend(SET_F(name)); by oappend(_name);
const.h: remove unset of 8266 variables as no behind the scene actions, this is just bad behavior and the pin drop downs will show this bad behavior
xml.cpp: show hardware defaults as ⍼ in dropdowns (better icon needed)
Fix 1d/2d default in customeffect, games and weather
index.htm: add buttons and text area for genPresets
index.js: add genPresets, uploadFileWithText and savePresetsGen
fx,cpp: set fire 2012 default palette 0 (fire colors)
Bonus: battery USERMOD_BATTERY_MEASUREMENT_PIN default -1
* added missing pinMode(.., INPUT) on esp32
* do not try reading from pin = -1 (ESP32-S2 shows very allergic reactions to this)
* Info page - show "n/a" when pin = -1
* readme: esp32 default pin = 35
