Fixed Vector4::operator<
Merge pull request #1514 from prshreshtha/patch-2

Fixed Vector4::operator<
Fixed Vector4::operator< (properly)
proper slider marker position calculation (no jumping on touch)
UI: control's addition/removing/hiding makes parents dirty, autoSize doesn't count invisible controls
Merge pull request #1520 from prshreshtha/patch-4

Fixed Vector4::operator< (properly)
Merge pull request #1521 from reven86/next-clean

UI fixes