New icons from Andrzej Ambroż / jendrzych:
- New icons for select tool modes
- Brought back screen icon for viewport visibility toggles
- Added new Instanced visibility toggle (unused currently - meant for forthcoming updates to the Outliner)
- New Gizmo icon for the header
- Many tweaks and alterations to existing icons. Full list on Devtalk
- Use correct icon when Proportional Editing is disabled
