tooltip carriage return and fonts

[lucazade]

I love new tooltip feature, thanks for adding it!

I would suggest to add two small features in tooltips if possible:

• better handling of carriage return (for output with multiple lines)
• possibility to define a personalized font (for example nerd font in order to user glyphs)

In the attached screenshot I had to hack main.qml in order to have multiple line stdout instead of formattedText