Add A GCode Viewer Widget

[karcaw]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
Can you add in a mini GCode Widget that shows the current layer and progress?

Describe alternatives you've considered
Clicking on the GCode viewer tab is nice, but I'd like it on the dashboard

[bereldhuin]

+1

[j7126]

#289