REACH-93 Create new Home workspace in nwk

Add a possibility into Flood to clear Home workspace with checking presence of unsaved changes 
[Here's a link to this task](http://adsk-oss.myjetbrains.com/youtrack/issue/REACH-93)

I have [made a task](http://adsk-oss.myjetbrains.com/youtrack/issue/REACH-113) in order to turn these property setters into ```private set```. See the new task for more details.