We have introduced a new mode into Gnome-Calculator, that is the Keyboard Mode. The Keyboard Mode as its name suggests, is designed for users who prefer to give input to the calculator only from keyboard. This mode does not consists of buttons panel, instead the space is occupied by button panel in other modes is allocated to History View. The mode also allows resizing of the Main Window. On resizing the Main Window, the History View resizes accordingly.
The keyboard mode appears as follows.
I have also added Documentation for History View as well as Keyboard mode in the Users Documentation.