Press This bookmarklet should not "work" on click in wp-admin

[markjaquith]

Related to the Press This bookmarklet redesign #17184, I wanted to disabling clicking on it, so that dragging is the only thing you can do. No one wants to blog a link to their Tools or Writing Settings page, so this is just another way for the user to fail.

I'm working on this now.

[markjaquith]

(In [17666]) Do not allow the Press This links to be click-activated when they are meant to be dragged. fixes #17192. see #17184

[johnbillion]

Several web services I've seen show an alert if the link is clicked, eg:

<a onlick="alert('Drag and drop this link to your bookmarks bar or right
click it and add it to your favorites.');return false;"  ...