Windows size saving not consistent across DPI

[cmbant]

When you close FileZilla and re-boot using a monitor with a different resolution, the location and size of the window is quite wrong. The size and position should be saved in a resolution-independent way (rather than raw pixels) so it will look similar when switching monitors/changing resolution. (my laptop has 4K screen, but often use with HD external monitor; restarting with a different config can result it FileZilla almost entirely off the right-hand side of the screen).