Task to figure out new design for how GP tools should integrate with topbar/toolbar design.
The main difference in 2.8, is that all the active tools (In this case brushes) will be in the toolbar, while all the tool settings will go in the top bar. You can refer to Sculpt Mode, which already works this way:
For the new 2D Draw Mode, we would like the tools to work the same way. Here's a mockup to demonstrate how it would work:
Initial icon design by Aslam Cader: