Timeline: add layer details view

Source/devtools/front_end/timelinePanel.css

Index: Source/devtools/front_end/timelinePanel.css
diff --git a/Source/devtools/front_end/timelinePanel.css b/Source/devtools/front_end/timelinePanel.css
index b90fbacf92830cabc03a37a9fb9700fac23720fa..b12c227f20a580232afb42f6440649a3a9014167 100644
--- a/Source/devtools/front_end/timelinePanel.css
+++ b/Source/devtools/front_end/timelinePanel.css
@@ -785,6 +785,11 @@
     flex: 1 1;
 }
 
+.transform-control-panel {
+    white-space: nowrap;
+    flex: none;
+}
+
 .transform-control-panel .status-bar-item > .glyph {
     -webkit-mask-image: url(Images/transformControls.png);
     -webkit-mask-size: 96px 24px;
@@ -882,3 +887,10 @@
     border: solid 1px black;
     -webkit-transform-origin: 0px 0px;
 }
+
+.layer-details-view ul {
+    list-style: none;
+    -webkit-padding-start: 0;
+    -webkit-margin-before: 0;
+    -webkit-margin-after: 0;
+}