Improved menu structure of file, edit and window menu. Removed ambiguous shortcuts, improved focus handling for operating the GUI with the keyboard. Added new shortcuts to focus subwindows directly. * files-dockwidget: Set focus proxy to the current directory line edit. * history-dockwidget: Set focus proxy to the inline search bar. * file-editor: Removed and improved shortcuts. * main-window: Added new slots for not only showing/hiding subwindows, but also for focussing them directly with Ctrl+0,1..4. Improved menu structure.

#include <iostream>
#include <octave/oct.h>

int
main (void)
{
  std::cout << "Hello Octave world!\n";
  int n = 2;
  Matrix a_matrix = Matrix (n, n);
  for (octave_idx_type i = 0; i < n; i++)
    {
      for (octave_idx_type j = 0; j < n; j++)
        {
          a_matrix (i, j) = (i + 1) * 10 + (j + 1);
        }
    }
  std::cout << a_matrix;
  return 0;
}