Added Gui timer auto refresh window on count and additional
name based API to detach timer from window. Added
TimerIDGenerator and exception throw on creating user timer
with same name.
Added new OnPageElement listView rebuild type. Created new
options refresh. Refactored DisplayLight Setting. BarGraph rector.
Added step render limit for small radius arcs.
* Timers now are Application thread safe
* Timers now have consistent API independend of Application (no more c style timers)
* Timers can have either: callback or override onTimer() method - this
way we can create more complicated timers or just use existing ones
* gui::Timer added via adapter class GuiTimer to decouple sys::Timer
with gui::Timer
* Fixed race in wrapper
* Updated docs
* fixed using std and cpp_freertos and DataReceivedHandler hidden in Application.hpp
