Upgrade and unbundle jquery-ui

Upgrade jquery-ui to >=1.10.1 and unbundle it to an xstatic package.

Since versions 1.10 and 1.11 use different directory structure, there is
a small conditional in the settings, using different paths depending on
the version.

Change-Id: If5116ec33cdb31b045d5c1c21b9640b38ff05f5e
Closes-bug: #1367720
Blueprint: remove-javascript-bundling
Merge "Upgrade and unbundle jquery-ui"