Sheepit Client Versions Save

The most important change since 5.613.2885 is how the cache/working directory is handle. When a user specify a working directory, two new directories ("sheepit" and "sheepit_binary_cache") are create inside of the user specified. It's done to avoid user mistaken set his home directory and everything in it be removed.

Changelog since 5.611.2884:

• Fix multiple blender running when user memory limit is trigger.
• Roll back scrollable window since it also scrolls horizontally.