Fix padding for metrics chooser in explore

public/vendor/css/rc-cascader.scss

@@ -16,7 +16,7 @@
 }
 .rc-cascader-menus.slide-up-enter,
 .rc-cascader-menus.slide-up-appear {
-  animation-duration: .3s;
+  animation-duration: 0.3s;
   animation-fill-mode: both;
   transform-origin: 0 0;
   opacity: 0;
@@ -24,7 +24,7 @@
   animation-play-state: paused;
 }
 .rc-cascader-menus.slide-up-leave {
-  animation-duration: .3s;
+  animation-duration: 0.3s;
   animation-fill-mode: both;
   transform-origin: 0 0;
   opacity: 1;
@@ -66,7 +66,7 @@
 .rc-cascader-menu-item {
   height: 32px;
   line-height: 32px;
-  padding: 0 16px;
+  padding: 0 2.5em 0 16px;
   cursor: pointer;
   white-space: nowrap;
   overflow: hidden;