Slickgrid ltr in rtl mode (#3744)

frappe/public/css/slickgrid.css

@@ -54,3 +54,6 @@
 .slick-row.odd .slick-cell {
   background-color: #fafbfc;
 }
+.frappe-rtl .slick-wrapper {
+  direction: ltr;
+}

frappe/public/less/slickgrid.less

@@ -60,3 +60,7 @@
 .slick-row.odd .slick-cell {
 	background-color: @light-bg;
 }
+
+.frappe-rtl .slick-wrapper {
+	direction: ltr;
+}