Opengb

Added
- Send temp updates using data parsed from heat bed/nozzle + wait messages
- Delete files from frontend

Fixed
- Broken final update on print completion for dummy printer
- Heat bed/nozzle + wait message has incorrect regex and was not matching

Changed
- Deal with split messages by always popping from the buffer on unparsed

Added
- Final progress_update message on print completion to dummy printer

Added
- delete_gcode_file API method
- Final progress_update message on print completion

Fixed
- Print hang bug by adding regex to match split "ok" message from Marlin
- Single-nozzle regex too permissive and matching dual-nozzle lines

Added
- Frontend auto-reconnect on disconnect

Changed
- Marlin serial buffer increased from 4 to 5
- Long log messages now trunacted to max 75 chars

Added
- Home all button to home page
- File list hidden when print in progress
- Set temperatures on home page

Fixed
- Error on frontend websocket disconnect
- Clear printer progress on frontend websocket disconnect
- Serial disconnect/reconnect not updating printer state
- Reconnection lag due to excessive debug log messages
- Gcode for setting temperature per nozzle
- Parsing of per-nozzle response to M105 temp request

Added
- Frontend websocket disconnection error.
- Get printer status on connect.
- Queuing on websocket.
- More feedback to print status circle in form of "heating/printing" message
- Hide print status circle when file not selected