ux: fix: last navigation menu's submenu was going off page to right

rhodecode/public/css/navigation.less

@@ -288,6 +288,11 b''
    }
 }
 
+.navigation li:last-child .submenu {
+    right: -20px;
+    left: auto;
+}
+
 .submenu {
     position: absolute;
     top: 100%;