DevTools: Tweaks to timeline overview popover

Source/devtools/front_end/ui_lazy/overviewGrid.css

Index: Source/devtools/front_end/ui_lazy/overviewGrid.css
diff --git a/Source/devtools/front_end/ui_lazy/overviewGrid.css b/Source/devtools/front_end/ui_lazy/overviewGrid.css
index 341b52f8968a5dfbdb8062181ab2daa9e9745519..0fd6ec01920fa13eb39428e5ad692553992308ea 100644
--- a/Source/devtools/front_end/ui_lazy/overviewGrid.css
+++ b/Source/devtools/front_end/ui_lazy/overviewGrid.css
@@ -61,7 +61,17 @@
     margin-right: -2px;
 }
 
-.overview-grid-current-position {
+.overview-grid-cursor-area {
+    position: absolute;
+    left: 0;
+    right: 0;
+    top: 20px;
+    bottom: 0;
+    z-index: 500;
+    cursor: text;
+}
+
+.overview-grid-cursor-position {
     position: absolute;
     top: 0;
     bottom: 0;