Update add.php

Change “Locator” for “Gridsquare” to standardise on one term throughout the UI.

application/views/user/add.php

@@ -74,7 +74,7 @@
 		</div>
 
 		<div class="form-group">
-		    <label>Locator</label>
+		    <label>Gridsquare</label>
 		    <input class="form-control" type="text" name="user_locator" value="<?php if(isset($user_locator)) { echo $user_locator; } ?>" />
 			<?php if(isset($locator_error)) { echo "<div class=\"small error\">".$locator_error."</div>"; } ?>
 		</div>