Bug 1407007 - Fix RTL alignment of search icon. r=dao

MozReview-Commit-ID: BT8ZVOIPQND

--HG--
extra : rebase_source : 116e4d7309df66bf406a9c480389fe9879007fd4

browser/themes/shared/urlbar-searchbar.inc.css

@@ -402,6 +402,11 @@
   height: 11px;
 }
 
+.searchbar-search-button[addengines=true] > .searchbar-search-icon-overlay:-moz-locale-dir(rtl) {
+  margin-inline-start: -25px;
+  margin-inline-end: 14px;
+}
+
 .searchbar-search-button:hover:not([addengines=true]) > .searchbar-search-icon-overlay {
   list-style-image: url(chrome://global/skin/icons/arrow-dropdown-12.svg);
   -moz-context-properties: fill;
@@ -410,3 +415,8 @@
   width: 6px;
   height: 6px;
 }
+
+.searchbar-search-button:hover:not([addengines=true]) > .searchbar-search-icon-overlay:-moz-locale-dir(rtl) {
+  margin-inline-start: -26px;
+  margin-inline-end: 20px;
+}