Fix background position in toolbar.css
Fix background position in toolbar.css

Fixed: chromium:1209729
Change-Id: I114fa426dcf9a619f5e35b580a64b937df26845c
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2902803
Auto-Submit: Alex Rudenko <d8d88e7d7e77f69e23d1d1432231196fb8e02a62@chromium.org>
Reviewed-by: Jack Franklin <993fcadce4d04090da2fefd557a0995e7966c8d5@chromium.org>
Commit-Queue: Jack Franklin <993fcadce4d04090da2fefd557a0995e7966c8d5@chromium.org>

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