HPCC-9276 Make DFUDetails Page more consistent visually.

Remove rounded corner div tags and styles and replace them with a more universal <hr/> tag to allow for seperation of
content but without compromising the application look and feel.

Signed-off-by: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Merge pull request #4417 from miguelvazq/HPCC-9276

HPCC-9276 Make DFUDetails Page more consistent visually.

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>