use actual instance path in stead of hardcoded one
2 col nav, 1 col links
strip action from original as well
start implementation separate link/img props
implement props modal
create relevant form depending on context; support float / align properly
full/roundtrip support for float/align/size classes
proper handling for propertiesform data
handle non-local paths
remove properties from external tabs
remove properties from default details template
cleanup; reformatting
no more modal stacking
prepare for an upload button
disable autoUpload; working (disabled when necessary) save button
cleanup
cleanup
cleanup
add missing explicit save_m2m if commit=False