in settings.cpp new "get" & "set" methods for font and color. All
settings now save into the file "config.cfg" and restore from it.
Totally reworked settings.cpp class, have no bikes), in class
settingsdialog.cpp added new method to set default option from ui
In settingsdialog.cpp added methods for load settings values on ui and
from ui. Cerrected some bags with fixation on color changes.