Correct some problems with swipe detection on main clock screen

Increase sensitivity so only a small swipe is needed to switch to the
appropriate screen.

Fix uninitialized variables for calculating swipe length which usually
caused first swipe length to register as NaN.

apps/timerclk/ChangeLog

@@ -2,3 +2,4 @@
 0.02: Add sunrise/sunset. Fix timer bugs.
 0.03: Use default Bangle formatter for booleans
 0.04: Use 'modules/suncalc.js' to avoid it being copied 8 times for different apps
+0.05: Improve responsiveness and detection of swipes on main clock screen

apps/timerclk/app.js

@@ -148,23 +148,23 @@ if (process.env.HWVERSION==1) {
   setWatch(()=>load("timerclk.alarm.js"), BTN3);
   setWatch(()=>load("timerclk.alarm.js"), BTN1);
 } else {
-  var absY, lastX, lastY;
+  var absY, lastX=0, lastY=0;
   Bangle.on('drag', e=>{
     if (!e.b) {
-      if (lastX > 50) { // right
+      if (lastX > 5) { // right
         if (absY < dragBorder) { // drag over time
           load("timerclk.timer.js");
         }else { // drag over date/dow
           load("timerclk.alarm.js");
         }
-      } else if (lastX < -50) { // left
+      } else if (lastX < -5) { // left
         if (absY < dragBorder) { // drag over time
           load("timerclk.stopwatch.js");
         }else { // drag over date/dow
           load("timerclk.alarm.js");
         }
-      } else if (lastY > 50) { // down
-      } else if (lastY < -50) { // up
+      } else if (lastY > 5) { // down
+      } else if (lastY < -5) { // up
       }
       lastX = 0;
       lastY = 0;

apps/timerclk/lib.js

@@ -87,7 +87,7 @@ exports.registerControls = function(o) {
         }
       }
     });
-    var absX, lastX, lastY;
+    var absX, lastX=0, lastY=0;
     Bangle.on('drag', e=>{
       if (!e.b) {
         if (lastX > 40) { // right

apps/timerclk/metadata.json

@@ -2,7 +2,7 @@
 	"id": "timerclk",
 	"name": "Timer Clock",
 	"shortName":"Timer Clock",
-	"version":"0.04",
+	"version":"0.05",
 	"description": "A clock with stopwatches, timers and alarms build in.",
 	"icon": "app-icon.png",
 	"type": "clock",