Adds a setting page to configure settings on demand

refs: #94

refs: #94

refs: #94

refs: #94

ToDo:
* Update README
* AP standalone Mode config
* reset all settings + modal with warning
* reset wireless settings

removes obsolete defines and includes secrets.h only if MQTT is used

slows down sinelon speed by 4 and adds speed adjustment to glitter

refs: #93

[ImgBot] Optimize images

/software_screenshots/wifi-manager.jpg -- 106.28kb -> 90.56kb (14.8%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

[ImgBot] Optimize images

*Total -- 2,464.43kb -> 2,353.09kb (4.52%)

/data/images/surr.png -- 2.88kb -> 1.85kb (35.78%)
/web_ui.jpg -- 2,461.54kb -> 2,351.24kb (4.48%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Fix randomDots.

#68 
Previously the while would trip the watchdog.

In development