MOB-2090: Use original image instead of thumbnail for map

What do you think about combining `getStashedImage()` with `getStahsedImageThumb()` make it public and unit test it? Something like code below but probably beautier :japanese_ogre:

```php
public function getStashedImage( $file, $type = 'original', $width = 200 ) {
    if( $type === 'original' ) {
        $url = $file->getOriginalFileUrl();
    } else if( $type === 'thumb' ) {
        $url = $file->getThumbUrl( $width . "px-" . $file->getName() ) 
    } else {
        throw Exception( 'Invalid $type parameter' );
    }

    return wfReplaceImageServer( $url );
}
```