Tutanota icon looks pixelated on windows

[kib42]

Screenshots

Test notes

• [ ] On Windows, verify the icon for the application does not look pixelated/aliased in these views:
  • [ ] Desktop
  • [ ] File explorer window views
    • [ ] Large icons
    • [ ] List
    • [ ] Medium-sized icons
  • [ ] Properties (right-click, show properties)
  • [ ] Taskbar

Regression test

• [ ] Right click the application on the desktop and show properties
  • [ ] Verify the icon colors are correct (should be red/white, not red/black, black/red, etc.)

[paw-hub]

I believe this is because the Windows icon lacks a low resolution version of the icon, so it's using nearest scaling.

Generally, a proper .ico file will have versions of the icon for all needed resolutions, but we're using a .png instead which only has one resolution.