i18n: Make close icon direction aware

Currently it always shows the icon for LTR no matter direction
of the user's language and this fixes it.

Bug: T315464
Change-Id: Ice6902a0823047380655b825aca9fbce14920d7d

resources/css/ext.uls.actions.menu.less

@@ -14,7 +14,9 @@
 		.uls-language-actions-close {
 			min-width: unset;
 			width: 44px;
-			background: transparent url( ../images/arrow-previous.svg ) no-repeat center;
+			// Note that CSSJanus is flipping the `ltr` in the URL to `rtl`.
+			// Therefore make sure that both icons are available and up-to-date.
+			background: transparent url( ../images/arrow-previous-ltr.svg ) no-repeat center;
 		}
 	}
 

resources/images/arrow-previous-rtl.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20">
+	<path d="M8.59 3.42 14.17 9H2v2h12.17l-5.58 5.59L10 18l8-8-8-8z"/>
+</svg>