Display current option value in the option list.
Redraw option layout.
Fix bug preventing options to be interpreted at all.
Initialize option with current values from Calculator.
Redraw MainTab to fit into small screens.
Add persistance to options over app reboot.
Add about tab.
Make links in AboutTab clickable.
Prepare the application's localization.
Add french localization.
Add scrolling to calculator tab.
Clean-up patches.