Recording stats layout customizable.

Users can select the order, visibility and importance (primary or secondary) of all stats for recording layout from the Settings.
Also, users can select the number of columns per row in the recording layout: 1, 2 or 3.
Finally, show altitude/coordinate from settings have been removed (not needed anymore).
Fixes #659.
Fixes #302.
Fixes #820.

src/main/res/values-el/strings.xml

@@ -213,7 +213,6 @@ limitations under the License.
     <!-- Settings Sensor -->
     <string name="settings_sensor_bluetooth">Bluetooth</string>
     <!-- Settings Stats -->
-    <string name="settings_stats_coordinate">Πλάτος/Μήκος</string>
     <string name="settings_stats_rate_title">Προτιμώμενος ρυθμός</string>
     <string name="settings_stats_units_imperial">Αγγλοσαξονικό (μίλια, πόδια)</string>
     <string name="settings_stats_units_metric">Μετρικό (χλμ, μέτρα)</string>