Issue #771036 by ojohansson, Albert Volkman, Gábor Hojtsy: Fixed Overlay overwrites existing target attribute.

Issue #1006042 by ksenzee, grendzy, scor: Fixed Links outside the overlay with existing fragments are broken.

Issue #1431076 by c960657, nod_, purencool, Nor4a: Fixed Overlay does not work with prefixed URL paths .

- Patch #1174686 by ksenzee: overlay parent improperly opens child overlay on specific external links.

- Patch #759844 by jpmckinney, dixon_, plach, ksenzee, fabsor, pillarsdotnet: overlay does not work with prefixed URL paths.

- Patch #896364 by frega, effulgentsia, Jacine, sun, David_Rothstein, Jeff Burnz, james.elliott, casey, mgifford: screen reader users and some keyboard only users need a clear, quick way to disable the overlay.

- Patch #841184 by ksenzee, aaronbauman, aspilicious: 'Skip to main content' link doesn't work correctly in the overlay.

- Patch #716612 by Everett Zufelt, casey: another step twoards making the overlay (more) accessible to screen reader users.

- Patch #667012 by ksenzee, casey, David_Rothstein: remove the opening of external links in a new browser window.

#655416 by casey, yoroy, BTMash, Bojhan, Gábor Hojtsy, sun, ksenzee, oseldman, jrguitar21, et al: 'Demonstrate block preview' should not open in the overlay, and should reflect the regions in the front-end theme.

- Patch #663126 by casey, ksenzee, seutje: active items in top level IA don't have the light gray background when overlay is enabled.

- Patch #667012 by ksenzee, casey: remove (or fix) the opening of external links in a new browser window.

- Patch #762348 by tstoeckler, BarisW, casey: update the document title using jQuery while using the overlay window.

- Patch #655722 by ksenzee, casey, Gábor Hojtsy, bleen18, David_Rothstein: changes made in an overlay session are not reflected when the user closes the overlay.

- Patch #725734 by casey, David_Rothstein, recidive, jpmckinney, aspilicious: overlay doesn't escape any page titles (residual cleanup).

- Patch #663126 by casey, seutje: active items in top level IA don't have the light gray background when overlay is enabled.

#668640 by casey, aspilicious, et al: Re-implement Overlay without jQuery UI Dialog; massive performance improvement, helps address several critical issues.

- Patch #690288 by casey, klausi: back button in overlay doesn't work properly when there's redirection, e.g. #admin/structure/trigger.

- Patch #655740 by ksenzee, casey, aspilicious: fixed small JavaScript issues in the overlay module.