Fixed (I hope) crash during server restart reported during testing, plus minor UI errors corrections.

app/src/main/java/uk/org/openseizuredetector/LocationFinder.java

@@ -1,5 +1,6 @@
 package uk.org.openseizuredetector;
 
+
 /**
  */
 
@@ -43,8 +44,9 @@ public class LocationFinder implements LocationListener
 
     public void destroy() {
         // Cancel location updates
-        mLocationManager.removeUpdates(this);
-
+        if (mLocationManager != null) {
+            mLocationManager.removeUpdates(this);
+        }
         // cancel the timeout timer
         if (mTimeoutTimer != null) {
             mTimeoutTimer.cancel();

app/src/main/java/uk/org/openseizuredetector/MainActivity.java

@@ -594,7 +594,7 @@ public class MainActivity extends AppCompatActivity {
                         tv.setTextColor(warnTextColour);
 
                         tv = (TextView) findViewById(R.id.appTv);
-                        tv.setText(R.string.WatchApp+" ----");
+                        tv.setText(getString(R.string.WatchApp)+" ----");
                         tv.setBackgroundColor(warnColour);
                         tv.setTextColor(warnTextColour);
 

app/src/main/java/uk/org/openseizuredetector/SdServer.java

@@ -388,6 +388,7 @@ public class SdServer extends Service implements SdDataReceiver {
         // Stop the location finder.
         if (mLocationFinder != null) {
             mLocationFinder.destroy();
+            mLocationFinder = null;
         }