Use escape sequence \x1B to clear messenger widget

[pennam]

Following the discussion here: https://forum.arduino.cc/t/dashboard-messenger-widget-scroll-clear-window/696962/17

If \x1B is sent and the property is linked to a messenger widget all prior messages will be hidden in the dashboard. Since there is no knowledge in the library about the widget i though to wrap the const sting in a generig namespace called PropertyActions.

If the property is declared as CloudString there is also the possibility to send the escape sequence using .clear() method

CloudString message;
...
message.clear();
...

or

String message;
...
message = PropertyActions::CLEAR;
...

[codecov-commenter]

Codecov Report

Merging #329 (fd7fe26) into master (04f41b8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #329   +/-   ##
=======================================
  Coverage   94.87%   94.87%           
=======================================
  Files          27       27           
  Lines        1113     1113           
=======================================
  Hits         1056     1056           
  Misses         57       57           

Impacted Files	Coverage Δ
src/property/Property.cpp	88.60% <ø> (ø)
src/property/Property.h	88.88% <ø> (ø)
src/property/types/CloudString.h	100.00% <ø> (ø)

---

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[github-actions]

Memory usage change @ fd7fe26

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m7	🔺 +8 - +72	0.0 - +0.01	🔺 +24 - +24	0.0 - 0.0
arduino:mbed_nano:nanorp2040connect	🔺 +46 - +46	0.0 - 0.0	🔺 +16 - +16	+0.01 - +0.01
arduino:mbed_nicla:nicla_vision	🔺 +64 - +72	0.0 - 0.0	🔺 +8 - +16	0.0 - 0.0
arduino:samd:mkr1000	🔺 +40 - +48	+0.02 - +0.02	🔺 +16 - +16	+0.05 - +0.05
arduino:samd:mkrgsm1400	🔺 +40 - +48	+0.02 - +0.02	🔺 +16 - +16	+0.05 - +0.05
arduino:samd:mkrnb1500	🔺 +40 - +56	+0.02 - +0.02	🔺 +16 - +32	+0.05 - +0.1
arduino:samd:mkrwan1300	🔺 +40 - +40	+0.02 - +0.02	🔺 +8 - +16	+0.02 - +0.05
arduino:samd:mkrwifi1010	🔺 +40 - +56	+0.02 - +0.02	🔺 +8 - +32	+0.02 - +0.1
arduino:samd:nano_33_iot	🔺 +44 - +52	+0.02 - +0.02	🔺 +12 - +20	+0.04 - +0.06
esp32:esp32:esp32	🔺 +36 - +64	0.0 - 0.0	🔺 +16 - +16	0.0 - 0.0
esp8266:esp8266:huzzah	🔺 +56 - +56	+0.01 - +0.01	🔺 +16 - +16	+0.02 - +0.02

Click for full report table

Board	examples/ArduinoIoTCloud-Advanced flash	%	examples/ArduinoIoTCloud-Advanced RAM for global variables	%	examples/ArduinoIoTCloud-Basic flash	%	examples/ArduinoIoTCloud-Basic RAM for global variables	%	examples/utility/ArduinoIoTCloud_Travis_CI flash	%	examples/utility/ArduinoIoTCloud_Travis_CI RAM for global variables	%	examples/utility/Provisioning flash	%	examples/utility/Provisioning RAM for global variables	%	examples/utility/SelfProvisioning flash	%	examples/utility/SelfProvisioning RAM for global variables	%
arduino:mbed:envie_m7	8	0.0	24	0.0	72	0.01	24	0.0	8	0.0	24	0.0	16	0.0	24	0.0
arduino:mbed_nano:nanorp2040connect	46	0.0	16	0.01	46	0.0	16	0.01	46	0.0	16	0.01	46	0.0	16	0.01	46	0.0	16	0.01
arduino:mbed_nicla:nicla_vision	64	0.0	16	0.0	72	0.0	8	0.0	72	0.0	8	0.0	64	0.0	16	0.0
arduino:samd:mkr1000	40	0.02	16	0.05	40	0.02	16	0.05	48	0.02	16	0.05	40	0.02	16	0.05
arduino:samd:mkrgsm1400	40	0.02	16	0.05	40	0.02	16	0.05	48	0.02	16	0.05	48	0.02	16	0.05
arduino:samd:mkrnb1500	56	0.02	32	0.1	40	0.02	16	0.05	48	0.02	16	0.05	40	0.02	16	0.05
arduino:samd:mkrwan1300	40	0.02	8	0.02	40	0.02	16	0.05	40	0.02	16	0.05
arduino:samd:mkrwifi1010	56	0.02	32	0.1	40	0.02	8	0.02	40	0.02	8	0.02	48	0.02	16	0.05	48	0.02	8	0.02
arduino:samd:nano_33_iot	44	0.02	20	0.06	44	0.02	12	0.04	44	0.02	12	0.04	52	0.02	20	0.06	52	0.02	12	0.04
esp32:esp32:esp32	36	0.0	16	0.0	64	0.0	16	0.0	40	0.0	16	0.0
esp8266:esp8266:huzzah	56	0.01	16	0.02	56	0.01	16	0.02	56	0.01	16	0.02

Click for full report CSV

Board,examples/ArduinoIoTCloud-Advanced<br>flash,%,examples/ArduinoIoTCloud-Advanced<br>RAM for global variables,%,examples/ArduinoIoTCloud-Basic<br>flash,%,examples/ArduinoIoTCloud-Basic<br>RAM for global variables,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>flash,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>RAM for global variables,%,examples/utility/Provisioning<br>flash,%,examples/utility/Provisioning<br>RAM for global variables,%,examples/utility/SelfProvisioning<br>flash,%,examples/utility/SelfProvisioning<br>RAM for global variables,%
arduino:mbed:envie_m7,8,0.0,24,0.0,72,0.01,24,0.0,8,0.0,24,0.0,16,0.0,24,0.0
arduino:mbed_nano:nanorp2040connect,46,0.0,16,0.01,46,0.0,16,0.01,46,0.0,16,0.01,46,0.0,16,0.01,46,0.0,16,0.01
arduino:mbed_nicla:nicla_vision,64,0.0,16,0.0,72,0.0,8,0.0,72,0.0,8,0.0,64,0.0,16,0.0,,,,
arduino:samd:mkr1000,40,0.02,16,0.05,40,0.02,16,0.05,48,0.02,16,0.05,40,0.02,16,0.05,,,,
arduino:samd:mkrgsm1400,40,0.02,16,0.05,40,0.02,16,0.05,48,0.02,16,0.05,48,0.02,16,0.05,,,,
arduino:samd:mkrnb1500,56,0.02,32,0.1,40,0.02,16,0.05,48,0.02,16,0.05,40,0.02,16,0.05,,,,
arduino:samd:mkrwan1300,40,0.02,8,0.02,40,0.02,16,0.05,40,0.02,16,0.05,,,,,,,,
arduino:samd:mkrwifi1010,56,0.02,32,0.1,40,0.02,8,0.02,40,0.02,8,0.02,48,0.02,16,0.05,48,0.02,8,0.02
arduino:samd:nano_33_iot,44,0.02,20,0.06,44,0.02,12,0.04,44,0.02,12,0.04,52,0.02,20,0.06,52,0.02,12,0.04
esp32:esp32:esp32,36,0.0,16,0.0,64,0.0,16,0.0,40,0.0,16,0.0,,,,,,,,
esp8266:esp8266:huzzah,56,0.01,16,0.02,56,0.01,16,0.02,56,0.01,16,0.02,,,,,,,,