Fallback favicons (and PWA logos) are not included

Currently, the Favicon objects used by django-favicon-plus-reloaded for including the favions in the HTML are only created/updated if the preference is changed (=new image uploaded).

added part::backend part::frontend prio::2 type::bug workflow::confirmed labels

assigned to @ZugBahnHof

added board::todo label

added board::ready label and removed board::todo label

assigned to @hansegucker and unassigned @ZugBahnHof

mentioned in merge request !601 (merged)

mentioned in commit 026ac068

closed with merge request !601 (merged)