Performance improvements

* Pre-compute name, formatted sizes and speeds.
* Handle name edge-cases such as no-path and no-uris better.
* Unroll getCtx.
* Improve performance of mergeMap.
* Delay the search filter.

As indicated by Chrome/Gecko profilers.
Hide dgraph on phones
Rewrite search
More quick-access stuff to the bottom.
Right-float the main download graph
Use angular-ui pagination
Style Quick Access save button
Display the full download.relpath as name.
Safari compat
IE compat
Fix overflow issues

By making fields potentially wide again