4K/HD adjustments

Fix firefox:

adjust theabout:config setting.
layout.css.devPixelsPerPx 1.50

Fix minetest:

adjust the configuration
Graphics -> Menus -> gui_scaling 0.57
Graphics -> Menus -> font_size 26

Luanti recommendation:

Accessibility -> Font size 16
Accessibility -> Chat Font size 0
Accessibility -> GUI Scaling 1.0
Accessibility -> HUD Scaling 1.0

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

Some of these need to be revised, not sure how things improved but I need to adjust above to what is necessary.