Add dropdown enhancements and new apps card with brand icons (#2249)

core/scss/ui/_dropdowns.scss

@@ -109,6 +109,7 @@
 
 .dropdown-menu-card {
   padding: 0;
+  min-width: 20rem;
 
   > .card {
     margin: 0;

core/scss/ui/_type.scss

@@ -184,6 +184,17 @@ a:hover:has(.icon) {
   text-decoration: none;
 }
 
+.link-hoverable {
+  border-radius: var(--#{$prefix}border-radius);
+  transition: background-color .15s ease-in-out;
+
+  &:hover {
+    text-decoration: none;
+    color: var(--#{$prefix}primary);
+    background: color-transparent(var(--#{$prefix}secondary), .04);
+  }
+}
+
 /**
 Subheader
  */