Restore GPS uncertainties on web UI.
<strong class="col-xs-6 text-center">Track:</strong>
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<div class="row">
- <span class="col-xs-6 text-center">{{gps_lat}}, {{gps_lon}} &plusmn; {{gps_accuracy}} m <br> {{gps_alt}} &plusmn; {{gps_vert_accuracy}} ft @ {{gps_vert_speed}} ft/min</span>
+ <span class="col-xs-6 text-center">{{gps_lat}}, {{gps_lon}} &plusmn; {{gps_horizontal_accuracy}} m <br>
+ {{gps_alt}} &plusmn; {{gps_vertical_accuracy}} ft @ {{gps_vert_speed}} ft/min</span>
<span class="col-xs-6 text-center">{{gps_track}}&deg; @ {{gps_speed}} KTS</span>
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