RO-86 - Controlled open state

```
Key: RO-86
Type: Story
Epic: Desktop
Labels: 
Priority: High
Affects Versions: 
Status: Backlog
Fix Versions: 
```
The ability for users to add new custom ways of opening and closing apps will likely become pretty important. Allow the {{open}} state (intialized by {{initialOpened}}) to be controlled by the desktop parent component.
