Improve styling for callouts

Update styles for callouts (warning, caution, note); also avoid applying
callout-specific styles to general block quotes.

layouts/partials/css.html

@@ -16,7 +16,7 @@
 {{- end }}
 
 <link rel="stylesheet" href="{{ "css/jquery-ui.min.css" | relURL }}">
-<link rel="stylesheet" href="{{ "css/callouts.css" | relURL }}">
+<link rel="stylesheet" href="{{ "css/feature-states.css" | relURL }}">
 <link rel="stylesheet" href="{{ "css/custom-jekyll/tags.css" | relURL }}">
 {{- if .Site.Params.announcement }}
 <link rel="stylesheet" href="{{ "css/announcement.css" | relURL }}">

layouts/shortcodes/caution.html

@@ -1,3 +1,3 @@
-<blockquote class="caution">
+<blockquote class="caution callout">
   <div><strong>{{ T "caution" }}</strong> {{ trim .Inner " \n" | markdownify }}</div>
 </blockquote>

layouts/shortcodes/deprecationfilewarning.html

@@ -1,3 +1,3 @@
-<blockquote class="deprecation_file_warning">
+<blockquote class="deprecation_file_warning callout">
   <div><h4>{{ T "deprecation_file_warning" }}</h4> {{ .Inner | markdownify }}</div>
 </blockquote>

layouts/shortcodes/note.html

@@ -1,3 +1,3 @@
-<blockquote class="note">
+<blockquote class="note callout">
   <div><strong>{{ T "note" }}</strong> {{ trim .Inner " \n" | markdownify }}</div>
 </blockquote>

layouts/shortcodes/warning.html

@@ -1,3 +1,3 @@
-<blockquote class="warning">
+<blockquote class="warning callout">
   <div><strong>{{ T "warning" }}</strong> {{ trim .Inner " \n" | markdownify }}</div>
 </blockquote>