files were deleted by fa2c560d

not perfect, but it works

Per request of @splitbrain

Access attempts to security.png are normally denied, so the name of the file will be more self-descriptive

Added to #scroll__here, #index__tree, #draft__status, #tool__bar, #dw__toc. This in in re: #2172

The empty string is not translatable in the translation interface and
causes all languages to be <100%

This is an alternative approach to #2164

There was a bug, where the options array ['Auto', 0, 1] would result in
HTML option tags where both the 'Auto' and the 0 option were selected.

This commit fixes a bug in the media manager when viewing an old version
of a media file. While, in case of an image, the old image would be
displayed in the third pane, the link above would still link to the
current version.

STREAM_CRYPTO_METHOD_TLS_CLIENT is only TLS 1.0 except for PHP 5.6.0-5.6.6 and 7.2.0+.