Media Detail view uses 640 width thumb url instead of using the original image URL

[maskaravivek]

The full image should only be downloaded when the user clicks to view the image.

As per the current code base, even on clicking the image, the media detail view shows the 640 width image as MediaDetailFragment also uses MediaWikiImageView. Will be fixing this too.

Going forward,

• list views will use the thumbnail, and fallback to the original image if thumbnail is not available
• the media detail view will use the original URL instead of using the thumbnail.

Originally posted by @maskaravivek in #2820 (comment)

[maskaravivek]

@misaochan @neslihanturan Is there a specific reason for using thumb urls even in media detail view? If not, I will go ahead and fix it.