Improve styling of tables in articles

Signed-off-by: chylex <contact@chylex.com>

CHANGELOG.md

@@ -6,6 +6,7 @@ The format is mostly based on [Keep a Changelog](https://keepachangelog.com/en/1
 ## [18.x.x]
 ### Changed
 - Add routes for starring/unstarring items by id
+- Improve styling of tables in articles
 
 ### Fixed
 - Fix updated api not returning any item after marking item as read (#1713)

css/content.css

@@ -639,6 +639,20 @@
     white-space: normal;
 }
 
+#app-content .body table {
+    border-collapse: collapse;
+}
+
+#app-content .body table th {
+    font-weight: bold;
+}
+
+#app-content .body table th,
+#app-content .body table td {
+    border: 1px solid var(--color-text-lighter);
+    padding: 2px 6px;
+}
+
 #app-content .body iframe {
     max-width: 100%;
 }