Missing spinner, when creating a share

[nickvergessen]

Steps

1. Add a sleep(5); before

   core/apps/files_sharing/api/ocssharewrapper.php

   Line 44 in 46045ec

   return $this->getShare20OCS()->createShare();

2. Share a file

Expected

Should see some spinner or anything else, telling the user that we are processing the info.
This is especially important for remote shares, where it might take a bit longer.
E.g. 8.1 (before the sidebar): https://doc.owncloud.org/server/8.1/user_manual/_images/direct-share-2.png

Actual

blank field, no info anywhere

@PVince81

[lock]

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