4K/HD adjustments

Fix firefox:

adjusting theabout:config setting.

layout.css.devPixelsPerPx 1.50

Fix minetest:

adjust the configuration

Graphics -> Menus -> gui_scaling 0.57

Graphics -> Menus -> font_size 26

Configure X and fvwm:

Stop gtk from deciding the cursor:

Edit ~/.config/gtk-3.0/settings.ini to remove the line which defines it:

gtk-cursor-theme-name=whiteglass

Use universal defaults instead:

Edit ~/.Xdefaults or ~/.Xresources to include lines:

Xcursor.theme: whiteglass

Xcursor.size: 22

Fix xterm default font:

Add the line below to ~/.Xdefaults

XTerm*Font:-misc-fixed-medium-r-normal--18-120-100-100-c-90-iso10646-1

Set date line in dclock from default 'fixed' to larger

dclock -nomiltime -scroll -blink -fg white -bg black -fn \-misc-fixed-medium-r-normal--18-120-100-100-c-90-iso10646-1 -led_off black -date "%a %b %d, %y" -slope 90.0 -thickness 0.5 -seconds