[l10n] Fix color picker issue with placeholders
[l10n] Fix color picker issue with placeholders

Bug: 1136655
Change-Id: I829b35fe94f310b8e3d3f88919c235dbea433b24
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2659016
Reviewed-by: Alex Rudenko <d8d88e7d7e77f69e23d1d1432231196fb8e02a62@chromium.org>
Commit-Queue: Peter Marshall <6d0eecbeb7fb9d172f49b4b32481d2466fd89429@chromium.org>

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