DevTools: render category filters in a way that they don't clash.

Source/devtools/front_end/elements/elementsPanel.css

Index: Source/devtools/front_end/elements/elementsPanel.css
diff --git a/Source/devtools/front_end/elements/elementsPanel.css b/Source/devtools/front_end/elements/elementsPanel.css
index 88f259dbe33b776d6365adaa7ef7d48459883256..421f61057d5fec7df95369cd15d51cc3cf060c41 100644
--- a/Source/devtools/front_end/elements/elementsPanel.css
+++ b/Source/devtools/front_end/elements/elementsPanel.css
@@ -456,9 +456,8 @@
     border-spacing: 0;
 }
 
-.styles-element-state-pane label {
-    display: flex;
-    margin: 1px;
+.styles-element-state-pane td {
+    padding: 0;
 }
 
 .styles-animations-controls-pane > * {
@@ -760,8 +759,9 @@ label.checkbox-with-label {
 .styles-pane-toolbar {
     float: right;
     margin-top: -3px;
+    background-color: rgba(255, 255, 255, 0.8);
 }
 
 .properties-widget-section {
     padding: 2px 0px 2px 5px;
-}
+}