Fix stylelint-config-standard issues in sources/navigatorTree.css
Fix stylelint-config-standard issues in sources/navigatorTree.css

Bug: chromium:1083142
Change-Id: Iaf2cd7207dd4106d5a66d8f2bb5b38bf1f654adc
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2282348
Auto-Submit: Alex Rudenko <d8d88e7d7e77f69e23d1d1432231196fb8e02a62@chromium.org>
Reviewed-by: Mathias Bynens <17a2cbc4e33156874a9862b0f530521117e66a3d@chromium.org>
Commit-Queue: Mathias Bynens <17a2cbc4e33156874a9862b0f530521117e66a3d@chromium.org>

ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend