Fix saving of mobile phone number

This change makes sure the field name matches the one referenced from SettingsViewModel.ts.

Author: jorrit

src/Server/OneTrueError.Web/Views/User/Settings.html

@@ -23,9 +23,9 @@ <h3>User information</h3>
                 </div>
             </div>
             <div class="form-group">
-                <label for="CellNumber" class="col-sm-2 control-label">Cellphone Number</label>
+                <label for="MobileNumber" class="col-sm-2 control-label">Cellphone Number</label>
                 <div class="col-sm-10">
-                    <input type="text" class="form-control" id="CellNumber" placeholder="Cellphone number" data-name="CellNumber">
+                    <input type="text" class="form-control" id="MobileNumber" placeholder="Cellphone number" data-name="MobileNumber">
                     <p class="help-block">Use E.164 format (+&lt;countryCode&gt;&lt;number&gt;). Example: +4670123456</p>
                 </div>
             </div>
@@ -71,4 +71,4 @@ <h3>Password reset</h3>
 <div class="row">
     <div class="col-lg-12">
     </div>
-</div>
+</div>