Media: Watch more events for input changes to catch paste, autocomplete, etc.

Fixes issue where pasting a URL in 'From URL' (via the context menu) did not
enable the insert button, as the event was not yet fired.

props koopersmith.
fixes #22545.



git-svn-id: https://core.svn.wordpress.org/trunk@22836 1a063a9b-81f0-0310-95a4-ce76da25c4cd