Update xstatic-jquery-ui for Horizon

The new versions of jquery-ui have a different layout of files
and directories, which make them incompatible with the old versions.
Rather than pinning the version on ancient 1.8.18, I decided to
make Horizon use the newer version with the newer file layout, hence
the need to upgrade to at least 1.10.1 (current Debian testing).

I will put some code in place that will make it also possible to use
1.11, which changes the file layout again.

Partial-bug: #1367720
Blueprint: remove-javascript-bundling

Change-Id: Ibf599f07b801cd3d907c426486b780aab17ceb9a
Merge "Update xstatic-jquery-ui for Horizon"