According to PurePhone design emergency call
window is needed after "SOS" callback at the screen lock.
This PR introduce implementation of emergency call window
and also refactor in the enter number window. Both windows
derives from new number window.
Reduce firmware size by refactoring global data defined in public
headers.
Each global variable which require runtime initialization adds
initialization code to every translation unit which includes the header
where the variable is defined and declared.
* [EGD-2548] added AddContactIcon
* [EGD-2548] added send message Icon - still need to use it in Call Window
* [EGD-2548] SendSmsIcon used in callwindow
* [EGD-2548] rewritten Icon class to be template based
Created all missing Icons
* [EGD-2548] integranio of new icons in callwindow and some fixes
* [EGD-2548] code clean up and tune up constants
* [EGD-2548] clang formatter and fix speaker icons
* [EGD-2548] revert of USE_DAEFAULT_BAUDRATE
* [EGD-2648] destruktor fix