DPSD-43: Fixed imageblock styling for floating images

To see this change in action, look at the test page output in either test-site-with-change-requests or test-site-without-change-requests (or the combined combine-test-pages). Under the Images test site, look at the floating images.

Here's an example link to the main branch (before the fix): Floating Images Before

Here's an example link to this branch (after the fix): Floating Images After

Notice the floating image that is left aligned now has the padding on the correct side. The before case slammed the image directly into the text and had a weird indent on the left, while the fixed version looks natural.