Theme the language selector for PleinLune

plugins/PleineLune/stylesheets/_layout.less

@@ -36,6 +36,19 @@
   font-weight: normal;
 }
 
+#languageSelect {
+  background: @theme-color-background-base;
+  border: 1px solid @theme-color-background-contrast !important;
+}
+
+#languageSelect a:hover {
+  background: @theme-color-background-smallContrast !important;
+  border: 0;
+  border-radius: 0;
+  color:  @theme-color-text-focus !important;
+}
+
+
 /* Logo */
 #logo {
   opacity: 0.5;