WP_Theme: Return false from the display() method when get() fails.

Fixes a potential warning on the themes page when the active theme is deleted.

fixes #26873.

Built from https://develop.svn.wordpress.org/trunk@27745


git-svn-id: http://core.svn.wordpress.org/trunk@27582 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revert [27166].

We should not be accounting for improper assignment of WP_Query properties.

fixes #26321.

Built from https://develop.svn.wordpress.org/trunk@27746


git-svn-id: http://core.svn.wordpress.org/trunk@27583 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Avoid JS errors before the commentReply script loads. Let's make this unobtrusive soon.

props aubreypwd.
fixes #24741.

Built from https://develop.svn.wordpress.org/trunk@27747


git-svn-id: http://core.svn.wordpress.org/trunk@27584 1a063a9b-81f0-0310-95a4-ce76da25c4cd