Panning the drawing area with middle click or pinch zoom

[anibalsolon]

I guess it was @xgui3783 's suggestion too 🙏🏻 (please correct me if it was not the middle click, maybe holding ctrl?)

What is the current behaviour?

At the moment, users need to move the cursor from the current drawing position to the minimap, so they can pan the image.

What is the expected or desired behavior?

Being able to pan using the middle click may help in the drawing flow, as the cursor stays close to where the user was drawing. Being able to pan with pinch would be a really good addition for tablets :) (loved the idea, @r03ert0 !)

[xgui3783]

Discoverability can also be an issue (if I recall, someone at the school specifically ask how to pan when drawing).

Would be nice to have a "hint" box. Don't know the implementation detail yet though 🤔