Inconsistent cursor size on HiDPI screens

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In X each application can set its own cursor. This can cause the cursor size to differ from window to window, which can be annoying.

To solve the issue, set the cursor size by adding gtk-cursor-theme-size=n to .config/gtk-3.0/settings.ini.

Solution found here: How to have consistent cursor size on HiDPI? More information on the Arch Linux Wiki: Cursor themes.