Add About Page To Additional Settings and SmartSpeaker Extension

[AIIX]

• Adds an About Page to additional settings

[codecov]

Codecov Report

Merging #149 (a2c565e) into dev (6ceb058) will increase coverage by 2.70%.
The diff coverage is 42.49%.

@@            Coverage Diff             @@
##              dev     #149      +/-   ##
==========================================
+ Coverage   50.35%   53.05%   +2.70%     
==========================================
  Files         119      152      +33     
  Lines       10077     9779     -298     
==========================================
+ Hits         5074     5188     +114     
+ Misses       5003     4591     -412     

Impacted Files	Coverage Δ
mycroft/audio/__main__.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/__main__.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/mark1/arduino.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/mark1/eyes.py	0.00% <0.00%> (ø)
mycroft/client/enclosure/mark1/mouth.py	0.00% <0.00%> (ø)
mycroft/client/speech/__main__.py	0.00% <0.00%> (ø)
mycroft/client/speech/hotword_factory.py	0.00% <0.00%> (-88.89%)	⬇️
mycroft/client/speech/service.py	0.00% <0.00%> (ø)
mycroft/client/speech/silence.py	0.00% <0.00%> (-42.86%)	⬇️
mycroft/client/text/__init__.py	0.00% <0.00%> (ø)
... and 120 more

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