Allow different banner options for default article page

[SamuelmdLow]

For some reason we only give the option to change the banner in full width articles. I don't see a reason for that. I also think the default banner is super ugly we should probably change it significantly.

[SamuelmdLow]

A problem with this is that the default field for the banner is "right image". In default article templates this is ignored. If we add different banner options, then suddenly all the defaults would become "right image" which would not be wanted. To fix this we should run an sql update command on the database before merging a fix

[SamuelmdLow]

Default to bottom image