* Fixed welcome window to disable back button.
* Added PRE_BETA_HACKERY symbolic constant that alters the download and extraction location of the core_file to the user selected folder and does not run xpinstall, instead of the normal behavior of extracting the core_file in "Temporary Items" and loading and running all downloaded .xips through xpinstall.
* Fixed terminal window icon repaint bug 13770.
git-svn-id: svn://10.0.0.236/trunk@48899 18797224-902f-48f8-a5cc-f745e15eee43