In marker detail page, add a label "Since last Statistics Marker".

In the marker detail page, on resume, update the waypoint
in case it is returning from marker edit page.

MyTracks/res/values/strings.xml

@@ -965,6 +965,11 @@ limitations under the License.
       %1$s marker type. E.g., 'building'.">
     Marker type: %1$s
   </string>  
+  <string name="marker_detail_statistics_title"
+    translation_description="In the marker detail page, the title for the statistics section
+      indicating that the data below are since the last Statistics marker.">
+    Since last Statistics marker:
+  </string>  
   <string name="marker_edit_marker_type"
     translation_description="In the marker edit page, the label for the marker type, including some
       exmaples.">

MyTracks/res/values/styles.xml

@@ -122,6 +122,10 @@ limitations under the License.
     <item name="android:layout_width">wrap_content</item>
     <item name="android:textSize">22sp</item>
   </style>
+  <!-- The style for large size text with top margin -->
+  <style name="TextLarge.WithTopMargin">
+    <item name="android:layout_marginTop">8dp</item>
+  </style>
   <!-- The style for medium size text -->
   <style name="TextMedium">
     <item name="android:layout_height">wrap_content</item>