RO-94 - Show app icon in title bar

```
Key: RO-94
Type: Story
Epic: Desktop
Labels: 
Priority: Medium
Affects Versions: 
Status: Backlog
Fix Versions: 
```
Show the app icon just to the left of the app name in the title bar (upper left corner of the window). It is unclear how this should behave for grouped apps (RO-64).
