Log Message:
Changes 2.12.3:
* Documentation: Improved the devhelp file to
  - show the full method name, including the class name.
  - really jump to the method's anchor on the page.
* Build: Fix the win32 build.

Changes 2.12.2:
* IconView: set_cursor(): Actually implement this.
* LinkButton: Correct the implementation of the
  constructor that takes just the URI. Bug 492200
* Build: Fix the build on MacOS X. Bug 493057.