A couple more admin non-filtered spots

[jhodgdon]

I found a couple more places in the admin menus where unfiltered category names and post titles are being put on the screen for display:

1) Convert Categories to Tags screen -- the list of existing categories -- category names are not filtered for display

2) Bookmarklet link on Write Post screen -- the post title is not filtered for display

I'll patch...

[jhodgdon]

Patch to fix both these issues

[jhodgdon]

Correction on bookmarklet - it's the blog title rather than the post title in the Bookmarklet link text. Anyway, patch has been added.

[ryan]

(In [6147]) Add some filtering. Props jhodgdon. fixes #5030

[ryan]

Changed the patch slightly. Removed a wp_specialchars call since the bloginfo filter takes care of that.