Altitude MSL vs. HAE

- consolidation of MSL and HAE text
- add some clarifying text in settings

web/plates/gps.html

@@ -83,9 +83,9 @@
     			</div>
 				<div class="row">
 					<span class="col-xs-6 text-center">{{gps_lat}}, {{gps_lon}} &plusmn; {{gps_horizontal_accuracy}} m <br>
-						<b>Altitude MSL:</b> <br>
+						<b>Height Above Mean Sea Level (MSL):</b> <br>
 						{{gps_alt}} &plusmn; {{gps_vertical_accuracy}} ft  @ {{gps_vert_speed}} ft/min <br>
-						<b>Height WGS-84 ellipsoid:</b> <br>
+						<b>Height Above Ellipsoid (HAE):</b> <br>
 						{{ gps_height_above_ellipsoid }} ft
 					</span>
 					<span class="col-xs-6 text-center">{{gps_track}}&deg; @ {{gps_speed}} KTS</span>

web/plates/settings.html

@@ -104,7 +104,7 @@
                         </form>
                 </div>
                 <div class="form-group reset-flow">
-                    <label class="control-label col-xs-5">GDL90 MSL Altitude</label>
+                    <label class="control-label col-xs-5">GDL90: Use MSL instead of HAE, please disable for ForeFlight and SkyDemon</label>
                     <div class="col-xs-5">
                         <ui-switch ng-model='GDL90MSLAlt_Enabled' settings-change></ui-switch>
                     </div>