Bump jQuery SelectBoxIt to the newest version

[#50153921]
Bump jQuery UI to the newest version

[#50153921]
Fix build routine for jQuery UI 1.10.3

[#50153921]
Fix an issue with with non-clickable elements in select boxes

[#50153921]

The main reason was z-index: 1 of semantic layout containers.
However new version of selectBoxIt plugin required some changes
in our hacks making it responsive (px => ems).