Backport "Correctly split the words when adding to the search index (see #5363)"
Do not use `@include_once()` in the `__autoload()` function (see #5440)
Correctly show the "invalid date and time" error message (see #5480)
Backport "Correctly set the cookie paths (see #5339)"
Backport 'Fix the "removeSession" callbacks (see #5353)'
Update TinyMCE to version 3.5.8 (see #5329)
Strictly compare values when determining whether to save or not (see #5471)
Only unset POST variables if `Widget::submitInput()` returns `true` (see #5474)