New work branch hein/fastFolders

[Eike Hein]

Hi,

just a heads up: I've made a new branch hein/fastFolders
in plasma-desktop to refactor FV for speed.

Currently with a 7x6 desktop widget pointed at /usr/bin,
it:

* Has about 3x-5x the frame rate while scrolling
* Doesn't block plasmashell startup for seconds with
  churn while initially listing
* Saves about ~10 MB of memory

With no functional regressions.

The QML Profiler is pretty fun.


Cheers,
Eike