updatemenus point in the direction they'll open

Author: alexcjohnson

src/components/updatemenus/constants.js

@@ -70,5 +70,13 @@ module.exports = {
     activeColor: '#F4FAFF',
 
     // color given to hovered buttons
-    hoverColor: '#F4FAFF'
+    hoverColor: '#F4FAFF',
+
+    // symbol for menu open arrow
+    arrowSymbol: {
+        left: '◄',
+        right: '►',
+        up: '▲',
+        down: '▼'
+    }
 };

src/components/updatemenus/draw.js

@@ -214,7 +214,7 @@ function drawHeader(gd, gHeader, gButton, scrollBox, menuOpts) {
         .classed('user-select-none', true)
         .attr('text-anchor', 'end')
         .call(Drawing.font, menuOpts.font)
-        .text('▼');
+        .text(constants.arrowSymbol[menuOpts.direction]);
 
     arrow.attr({
         x: menuOpts.headerWidth - constants.arrowOffsetX + menuOpts.pad.l,