Adjust filter bar width for settings experiments

Before: https://i.imgur.com/lOcJJw8.png
After: https://i.imgur.com/QYs8Ug8.png
Fixed: 408940901
Change-Id: I8deb54cc5d2ec1724211ec372ad15323738ee67f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6434119
Commit-Queue: Kim-Anh Tran <kimanh@chromium.org>
Reviewed-by: Kateryna Prokopenko <kprokopenko@chromium.org>

Author: ktran

front_end/panels/settings/settingsScreen.css

@@ -32,7 +32,12 @@ label {
 
 .experiments-filter {
   width: 100%;
-  padding: 0 var(--sys-size-4) 0 var(--sys-size-3);
+  padding: 0 var(--sys-size-9) 0 var(--sys-size-8);
+  max-width: var(--sys-size-35);
+
+  > devtools-toolbar {
+    min-width: var(--sys-size-31);
+  }
 }
 
 .settings-select {