Made choice for virtual keyboard configurable through the $KEYBOARD environment variable.

This implements what was suggested in the discussion regarding the svkbd
patch, it makes the choice of virtual keyboard configurable using the
$KEYBOARD variable, rather than hard-coding it.

scripts/appscripts/sxmo_timer.sh

@@ -24,7 +24,7 @@ timerrun() {
 }
 
 menu() {
-	pidof svkbd-sxmo || svkbd-sxmo &
+	pidof "$KEYBOARD" || "$KEYBOARD" &
 	TIMEINPUT="$(
 	echo "
 		1h
@@ -42,9 +42,9 @@ menu() {
 		Close Menu
 	" | awk 'NF' | awk '{$1=$1};1' | dmenu -p Timer -c -fn "Terminus-30" -l 20
 	)"
-	pkill svkbd-sxmo
+	pkill "$KEYBOARD"
 	[ "Close Menu" = "$TIMEINPUT" ] && exit 0
 	st -f Monospace-50 -e "$0" timerrun "$TIMEINPUT"
 }
 
-if [ $# -gt 0 ]; then "$@"; else menu; fi
+if [ $# -gt 0 ]; then "$@"; else menu; fi