Update search.blade.php (#943)

Added the ability to select and search an airline's flights. Will be usefull in multiple airline installations/configs.

Co-authored-by: Nabeel S <nabeelio@users.noreply.github.com>

resources/views/layouts/default/flights/search.blade.php

@@ -7,6 +7,11 @@
               'method' => 'GET',
               'class'=>'form-inline'
       ]) }}
+      <div class="mt-1">
+        <p>@lang('common.airline')</p>
+        {{ Form::select('airline_id', $airlines, null , ['class' => 'form-control select2']) }}
+      </div>
+      
       <div>
         <p>@lang('flights.flightnumber')</p>
         {{ Form::text('flight_number', null, ['class' => 'form-control']) }}