Updates for 1.1.3 release.
Merged r5285 from trunk.
Merged r5283 from trunk.
Merged r5176 from trunk.
Merged r5171 from trunk.
Merged r4735 from trunk.
Fixes Prototypejs Form.serialize() for multiple selects (#7954).
Merged r5469 from trunk.
Backported r5581 from trunk.
Merged r5330 from trunk.