Customize font, label and icon's size

[rzhli]

Currently I didn't find any option to magnify these font, tab and icons size, they are too small from my view, hope adding this custom option

[DanWBR]

Added. The Preferences window already had a "Scaling Factor" field but it wasn't wired to anything; it now scales the whole cross-platform interface: fonts, controls, tabs and menu icons. Set it under Preferences → Scaling (e.g. 1.25 for 25% larger) and restart DWSIM. Next release. Thanks.