add option to clear the log

res/menu/options.xml

@@ -3,6 +3,10 @@
 		android:title="@string/preferences"
 		android:alphabeticShortcut="p"
 		android:icon="@android:drawable/ic_menu_preferences" />
+	<item android:id="@+id/clear"
+		android:title="@string/clear_log"
+		android:alphabeticShortcut="c"
+		android:icon="@android:drawable/ic_menu_close_clear_cancel" />
 	<item android:id="@+id/about"
 		android:title="@string/about"
 		android:alphabeticShortcut="a"

res/values/strings.xml

@@ -64,6 +64,7 @@
 <string name="about">About</string>
 <string name="show_map">Show Map</string>
 <string name="show_log">Show Log</string>
+<string name="clear_log">Clear Log</string>
 <string name="quit">Quit</string>
 <string name="preferences">Preferences</string>
 <!-- preferences -->

src/APRSdroid.scala

@@ -174,6 +174,10 @@ class APRSdroid extends Activity with OnClickListener
 		case R.id.preferences =>
 			startActivity(new Intent(this, classOf[PrefsAct]));
 			true
+		case R.id.clear =>
+			storage.trimPosts(System.currentTimeMillis)
+			postcursor.requery()
+			true
 		case R.id.about =>
 			aboutDialog()
 			true