Fixed uploading by drag and drop into folder
Fix appending of rows after upload

When uploading files or folders, they only need to be appended or
updated when their path or a section of their path is inside the current
directory (which happens for folder upload)

Fixes issue where file was appended when dragging on a parent directory
onto the breadcrumb.

Fixes appending issue when uploading folders.
Merge pull request #9108 from owncloud/uploadintofolderfix

Fix many issues with drag and drop upload