Setting the background to white is removed since it doesn't work well
with the zooming (Outside the image boundaries is still transparent)

Signed-off-by: ktprograms <ktprograms@gmail.com>

Add window resize event listener to check if image is filling width or
height and then set either (width,max-height) or (height,max-width) such
that small images are still resized to fill the view area.

Signed-off-by: ktprograms <ktprograms@gmail.com>