Update the Hephestos 2 default config

fix spelling

Thermister -> Thermistor

Add pt_pt-utf8 language pack and fix some minor compiler warnings

follow-up the commit b82d91ec

Fix extrudernum in MSG_INVALID_EXTRUDER

This is quite comprehensive. If probes are disabled in any case when they shouldn't be, I'm sure we will hear about it soon.

Delta-compatible extensions to M48

Added missing translations.

Stop print timer with M105/M109

Fix KEEPALIVE_STATE

Added pt_pt-utf8 language pack; Fixed some minor compiler warnings; Harmonize file suffix for the current existing UTF8 language packs; Updated all configuration files to reflect the new language packs

follow-up the commit b82d91ec

SERIAL_ECHO is not very good in printing uint8_t - so cast. to int.

Add return to NOT_BUSY for M105
Replace WAIT_FOR_USER with PAUSED_FOR_USER

Add Travis test for FILAMENTCHANGEENABLE

Improve the descriptions for THERMAL_PROTECTION

follow-up the PR #3180, #3183

Czech language specific changes

Patch drain_queued_commands_P

Fix a SNAFU that should have been caught in #3012

Also closes #3181.

Include M665 "ABC" parameters in EEPROM

Addressing #2773

Use const parameters in lcd_implementation_drawedit (etc.)

Partial implementation with reference to MarlinFirmware/Marlin#3011

Alternative fix to #3149