Bug 1449804 - Part 2: Avoid overwrapping the label content of animation detail title. r=gl

MozReview-Commit-ID: EOAto87YjFP

--HG--
extra : rebase_source : 8137e23a8f15b4de0b26b916eb592a92523cbae1

devtools/client/themes/animation.css

@@ -349,6 +349,8 @@ select.playback-rate-selector.devtools-button:not(:empty):not(:disabled):not(.ch
 
 .animation-detail-title {
   flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
   white-space: nowrap;
 }