New Calculate functions

In Windows 7, separate Programmer, Statistics, Unit Conversion, Date Calculation, and Worksheets modes were added. Tooltips were removed.
In every mode (except Statistics) one can see the history of calculations.
The applet was redesigned to accommodate multitouch.
In Scientific mode, the base conversion functions were moved to the Programmer mode, and Statistics functions were moved to the Statistics mode.
On the right of the main Calculator one can add a panel with Date Calculation, Unit Conversion, and Worksheets.
The included Worksheets allow one to calculate a result of a chosen field based on the values of other fields. Pre-defined templates include calculating a car’s fuel economy (mpg and L/100 km), a vehicle lease, and a mortgage.