Replaces all uses of `TEMPLATEPATH` and `STYLESHEETPATH` in core with `get_template_directory()` and `get_stylesheet_directory()`.

Add `@deprecated` annotations to `TEMPLATEPATH` and `STYLESHEETPATH` definitions.

Props obenland, aaroncampbell. 
Fixes #18298.

Built from https://develop.svn.wordpress.org/trunk@28563


git-svn-id: http://core.svn.wordpress.org/trunk@28389 1a063a9b-81f0-0310-95a4-ce76da25c4cd
`wp_dropdown_pages()` allows `option_none_value` to be passed. Add that arg to the `$defaults` for `wp_dropdown_users()` and `wp_dropdown_categories()` as well.

Props solarissmoke. 
Fixes #16625.

Built from https://develop.svn.wordpress.org/trunk@28564


git-svn-id: http://core.svn.wordpress.org/trunk@28390 1a063a9b-81f0-0310-95a4-ce76da25c4cd
wpView: fix selecting a view's text string in Safari, props gcorne, fixes #28088
Built from https://develop.svn.wordpress.org/trunk@28565


git-svn-id: http://core.svn.wordpress.org/trunk@28391 1a063a9b-81f0-0310-95a4-ce76da25c4cd