Add missing semicolons in CSS files (#408)

Many of the CSS files had no semicolon after the last rule in a block,
which is proper syntax, but it's annoying when adding more rules. Since
omitting the semicolons doesn't really have a benefit, I've decided to
add them.

assets/css/common/search.css

@@ -41,5 +41,5 @@
 
 #searchResults .focus {
     transform: scale(.98);
-    border: 2px solid var(--tertiary)
+    border: 2px solid var(--tertiary);
 }