DevTools: fix janky transition in sensors panel

third_party/WebKit/Source/devtools/front_end/emulation/sensors.css

Index: third_party/WebKit/Source/devtools/front_end/emulation/sensors.css
diff --git a/third_party/WebKit/Source/devtools/front_end/emulation/sensors.css b/third_party/WebKit/Source/devtools/front_end/emulation/sensors.css
index 20f25e647783a1d86c885a39b1c6660f34a67b91..8fec49eee9c533b2b8234e1cbac8332e2d8a7d27 100644
--- a/third_party/WebKit/Source/devtools/front_end/emulation/sensors.css
+++ b/third_party/WebKit/Source/devtools/front_end/emulation/sensors.css
@@ -80,6 +80,7 @@
 .sensors-group {
     display: flex;
     flex-wrap: wrap;
+    margin-bottom: 10px;
 }
 
 .geo-fields {
@@ -143,12 +144,19 @@
     top: 0;
     bottom: 0;
     margin: auto;
+    transform: rotate3d(1, 0, 0, 90deg);
 }
 
-.orientation-box.is-animating {
+.orientation-box.is-animating, .is-animating .orientation-layer {
     transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;
 }
 
+.orientation-layer {
+    width: 100%;
+    height: 100%;
+    transform-style: preserve-3d;
+}
+
 .orientation-front,
 .orientation-back
 {