Menus and the conversion mode

In a former post I mentioned an idea of how to make the conversion mode better accessible. To achieve this, I now changed the way the two menu buttons work. Until version 1.2 (the current version), conversions are implemented as a base (i.e. BIN, OCT, HEX, DEC, CONV). But the conversion mode is really the same as the decimal mode. The conversion 'base' existed to change the function of the menu button.

The menus now work like this:

LEFT MENU	RIGHT MENU	LEFT MENU	RIGHT MENU
Menu	Function	Menu	Function
(press)			(press)
Constants	Back	Back	Convert
(press)			(press)
Menu	Back	Back	Function

Pressing back always takes you back to the digits panel.