hwt: Center "Wash ..." text properly

apps.json

@@ -1889,7 +1889,7 @@
   {
     "id": "widhwt",
     "name": "Hand Wash Timer",
-    "version": "0.02-rc7",
+    "version": "0.02-rc8",
     "description": "On Bangle.js 1 swipe your wrist over the watch face to start your personal Bangle.js 1 hand wash timer. On Bangle.js2 the Pattern Launcher is recommended to start the timer. Start washing after the short buzz and stop after the long buzz 35sec. later.",
     "icon": "widget.png",
     "type": "widget",

apps/widhwt/app.js

@@ -2,7 +2,9 @@
 // with our own message
 g.clearRect(38, 68, 138, 108);
 g.drawRect(38, 68, 138, 108);
-g.setFontVector(13).drawString("Wash...", 60, 82);
+g.setFontVector(13).setFontAlign(0, 0, 0).drawString("Wash...",
+                                                     g.getWidth()/2,
+                                                     g.getHeight()/2);
 
 Bangle.buzz();
 setTimeout(() => {