macosx: fix podcast view interfering with dropzone
macosx: fix podcast view interfering with dropzone

(cherry picked from commit 2b6a8709c5282bf40b3667376d7e67b6ca46b262)
Signed-off-by: David Fuhrmann <0373137a05c54ad8db3bae67bf852110dab006a2@videolan.org>

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2