In initial design a `TobBar`'s SimCard icon with number is supposed
to display on the home screen only if there are two cards inserted.
Because of the hardware limitations (there is no way of telling if
there is a single or two cards inserted) the established consensus is
that home screen should not display SimCard widget unless it's
indication error state.
Although in the task description there is only home screen mentioned,
the behaviour was established for all `ApplicationDesktop`'s windows.
Status bar SIM widget refactor
Status bar time widget recfactor
Status bar lock widget refactor
Separation of status bar time widget and desktop main window time widget
Fixed issue with wrong calculation of timezone based time
