Issue #2187837 by Devin Carlson: Brought media element and field widget inline with managed_file equivalents.
Issue #2182823 by Devin Carlson: Displayed dialog title and close button for better UX.
Issue #2180641 by Devin Carlson: Removed stdClass type hinting.
Issue #2187893 by Devin Carlson: Simplified the list of internet media providers.
Revert "Issue #2126697 by kaidjohnson, briand44: Wysiwyg -- Alt and Title fields require some special handling."

This reverts commit aed50be25d6655cfa85ef1b282788f67b3972301.
Standardized element file upload delta key.