Fixed indentation of if block for 'about' feature.

Fixed indentation of if block that check role_allows for 'about' feature. This was causing none of the sub menus under 'Configure' maintab to be displayed if user had no access to 'about' feature.

https://bugzilla.redhat.com/show_bug.cgi?id=1136112
Merge pull request #554 from h-kataria/configuration_maintab_if_block_indenation_fixed

Fixed indentation of if block for 'about' feature.