gbridge: fix HRM setting

The settings menu didn't handle `undefined` value for `hrm` properly, so
you were unable to toggle it.
Fixed by forcing the value to a boolean.

apps.json

@@ -139,7 +139,7 @@
   { "id": "gbridge",
     "name": "Gadgetbridge",
     "icon": "app.png",
-    "version":"0.20",
+    "version":"0.21",
     "description": "The default notification handler for Gadgetbridge notifications from Android",
     "tags": "tool,system,android,widget",
     "readme": "README.md",
@@ -2905,5 +2905,5 @@
     {"name":"arrow.app.js","url":"app.js"},
     {"name":"arrow.img","url":"icon.js","evaluate":true}
   ]
-}  
+}
 ]

apps/gbridge/ChangeLog

@@ -20,3 +20,4 @@
 0.18: Added reporting of step count and HRM (new Gadgetbridges can now log this)
 0.19: Support for call incoming/start/end
 0.20: Reduce memory usage
+0.21: Fix HRM setting

apps/gbridge/settings.js

@@ -31,7 +31,7 @@
     },
     "Find Phone" : function() { E.showMenu(findPhone); },
     "Record HRM" : {
-      value: settings().hrm,
+      value: !!settings().hrm,
       format: v => v?"Yes":"No",
       onchange: v => updateSetting('hrm', v)
     },