* Fixes and updates for thermostat and display:
- Switch to original esp8266-oled-ssd1306 library
- Fixes and updates for thermostat and display
- Add display switching off after interval
- If THERMOSTAT_DISPLAY_SUPPORT enabled, then one click enable display, long click switch relay. This functionality also depend on fix for long click. See pull request https://github.com/xoseperez/espurna/pull/2172
* Move buttons definitions for display to dependencies.h
* Pin ThingPulse/esp8266-oled-ssd1306#3398c97