Load/save groovy console scripts from location under the current user

[paul-bjorkstrand]

Since the groovy console's power is somewhat limited by the user's privileges, I think it would make sense to have users store their saved scripts into their own location. This location would show up on the "Open" dialog, in addition to the common/provided scripts & samples inside /etc/groovyconsole/scripts. Some benefit include

• All users can save scripts, without the possibility to overwrite someone else's scripts
• Custom scripts can be protected within the normal ACL process (by default, users have full access to their own user location under /home/users)
• Users can modify sample scripts and save them within the tool, while they may only have read-access to the /etc/groovyconsole path

Possible difficulties:

• browsedialog widget supports one tree root, but a custom tree loader may overcome this difficulty
• browsedialog may not support having a dynamic path, but again, it may be overcome by a custom tree loader