When intrinsic image widths aren't wide enough to fill the given space for media in the 'Media Left' article template, we can use the .t-imageMatte class to ease the pain. Doing so will create a gray matte behind each image, and also not allow the image
to grow wider than its actual, or intrinsic, width. This class override will also prevent image heights from growing larger than 200px on viewports >600px. Why 600px? That just happens to be the media query in our current code base that removes
the height restriction on larger viewport widths, so I am simply overriding that here.