Add styles for <abbr> HTML tag

ui/static/css/common.css

@@ -977,6 +977,12 @@ article.feed-parsing-error {
     top: -0.5em;
 }
 
+.entry-content abbr {
+    cursor: pointer;
+    text-decoration: none;
+    border-bottom: 1px dashed var(--entry-content-abbr-border-color);
+}
+
 details.entry-enclosures {
     margin-top: 25px;
 }

ui/static/css/dark.css

@@ -95,6 +95,7 @@
     --entry-content-code-background: #555;
     --entry-content-code-border-color: #888;
     --entry-content-quote-color: #777;
+    --entry-content-abbr-border-color: #777;
     --entry-enclosure-border-color: #333;
 
     --parsing-error-color: #eee;

ui/static/css/light.css

@@ -95,6 +95,7 @@
     --entry-content-code-background: #f0f0f0;
     --entry-content-code-border-color: #ddd;
     --entry-content-quote-color: #666;
+    --entry-content-abbr-border-color: #999;
     --entry-enclosure-border-color: #333;
 
     --parsing-error-color: #333;

ui/static/css/system.css

@@ -94,6 +94,7 @@
     --entry-content-code-background: #f0f0f0;
     --entry-content-code-border-color: #ddd;
     --entry-content-quote-color: #666;
+    --entry-content-abbr-border-color: #999;
     --entry-enclosure-border-color: #333;
 
     --parsing-error-color: #333;
@@ -200,6 +201,7 @@
         --entry-content-code-background: #555;
         --entry-content-code-border-color: #888;
         --entry-content-quote-color: #777;
+        --entry-content-abbr-border-color: #777;
         --entry-enclosure-border-color: #333;
 
         --parsing-error-color: #eee;