In `media_upload_gallery_form()`'s inline JavaScript, remove unnecessary comment tags.

Fixes #25637.


Built from https://develop.svn.wordpress.org/trunk@28368


git-svn-id: http://core.svn.wordpress.org/trunk@28196 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In the `Attachment Details` section of the media modal, only add `box-shadow` to images. Other mime-type icons look strange with an arbitrary border.

Props avryl.
Fixes #27949.


Built from https://develop.svn.wordpress.org/trunk@28369


git-svn-id: http://core.svn.wordpress.org/trunk@28197 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow users to set overrides for MediaElement instances by always passing `_wpmejsSettings` instead of just `_wpmejsSettings.pluginPath`.

Props Otto42 for the initial patch.
Fixes #25243.


Built from https://develop.svn.wordpress.org/trunk@28370


git-svn-id: http://core.svn.wordpress.org/trunk@28198 1a063a9b-81f0-0310-95a4-ce76da25c4cd