Status bar fixes for nettraf and memory (#627)

* More precise RAM measurement and fix of memory type

* Should be KiB 

kB refers to
https://en.wikipedia.org/wiki/Kibibyte

.local/bin/statusbar/memory

@@ -9,4 +9,4 @@ case $BLOCK_BUTTON in
 	6) "$TERMINAL" -e "$EDITOR" "$0" ;;
 esac
 
-free -h | sed -n '2{p;q}' | awk '{print "🧠", $3 "/" $2}'
+free --mebi | sed -n '2{p;q}' | awk '{printf ("🧠 %2.2fGiB/%2.2fGiB", ( $3 / 1024), ($2 / 1024))}'