fix(files_sharing): bring back owner and ownerDisplayName initial state

[skjnldsv]

Regression from #45652

It's still being used in

server/apps/files_sharing/src/views/PublicAuthPrompt.vue

Lines 69 to 73 in b27d760

	owner: loadState('files_sharing', 'owner', ''),
	ownerDisplayName: loadState('files_sharing', 'ownerDisplayName', ''),
	label: loadState('files_sharing', 'label', ''),
	note: loadState('files_sharing', 'note', ''),
	filename: loadState('files_sharing', 'filename', ''),

[skjnldsv]

/backport to stable31

[susnux]

It's still being used in

Cant we just use the owner of the root file? That way we do not need any custom initial state
No this is show earlier.

[skjnldsv]

Cant we just use the owner of the root file? That way we do not need any custom initial state No this is show earlier.

I'm currently working in related areas. So I'd like to have this fix in at least.
Maybe I'll improve the way we handle this in the future, but I'd say it's not the priority here :)