Remove special case in animation playback rate button
Remove special case in animation playback rate button

The playback rate button had a special style for what appears
to be the "default" playback speed of 100%. This CL removes that
as it confused at least one user.

Fixed: chromium:1207901
Change-Id: I73342d7136bf6db6a5b2c2c1967d1eb641a6030b
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3023629
Commit-Queue: Sigurd Schneider <f04d242e109628a27a0f75fd49a87722bcf291fd@chromium.org>
Reviewed-by: Jack Franklin <993fcadce4d04090da2fefd557a0995e7966c8d5@chromium.org>
Reviewed-by: Peter Müller <296389d11343900e76d73969c719e93a67ee1bb5@chromium.org>

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