Ardjson tft

[lbussy]

Notes from Tim's PM:

• Combined jquery requests of About.htm page into a single query.
  • Seems to have a big impact on improving stability.
  • The needed changes to the http_server were also part of this change.
• Replaced Arduino_GFX and Arduino_ILI9341 libraries with latest TFT_eSPI library.
  • This library has much more efficient SPI access.
  • Library recently added support for DMA access which reduces burden on the CPU during transfers to the screen hardware. This was enabled.
  • The SetRotation() function does not work on the fly with this library and the code was changed to restart the tiltbridge if the invertTFT setting is changed
• TFT Touch functionality has been disabled for now. This should be possible to re-enable in the future.
• Moved the LCD screen handling work back to the main loop task as the separate low priority task did not appear to provide appreciable benefit.

[lbussy]

For now, I'm removing:

• Restarting on mDNS change (I think I can achieve this without a restart)
• Restarting on TFT rotation change (I just want to check on that more)
• Combining "About" JSON. I want to leave it in as a known good fail case, we can always come back to it