Fix "removeTabHeader" on Internet Explorer
Fix "removeTabHeader" on Internet Explorer

Internet explorer does not support the "ChildNode.remove()" method, so
the node needs to be removed through its parent (which is also supported
by the rest of browsers).

Signed-off-by: Daniel Calviño Sánchez <bd7629e975cc0e00ea7cda4ab6a120f2ee42ac1b@gmail.com>

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed