Fix staticPlot behaviour for range slider and legend

These changes ensure that when `staticPlot` is active:

1. Items inside a legend cannot be toggled
2. The range slider cannot be interacted with, and the grab handles
   for adjusting the slider box are hidden.

Fixes #5177

Author: miqh

src/components/legend/draw.js

@@ -460,6 +460,8 @@ function ensureLength(str, maxLength) {
 }
 
 function setupTraceToggle(g, gd) {
+    if(gd._context.staticPlot) return;
+
     var doubleClickDelay = gd._context.doubleClickDelay;
     var newMouseDownTime;
     var numClicks = 1;

src/components/rangeslider/draw.js

@@ -232,6 +232,8 @@ module.exports = function(gd) {
 };
 
 function setupDragElement(rangeSlider, gd, axisOpts, opts) {
+    if(gd._context.staticPlot) return;
+
     var slideBox = rangeSlider.select('rect.' + constants.slideBoxClassName).node();
     var grabAreaMin = rangeSlider.select('rect.' + constants.grabAreaMinClassName).node();
     var grabAreaMax = rangeSlider.select('rect.' + constants.grabAreaMaxClassName).node();
@@ -590,6 +592,8 @@ function drawSlideBox(rangeSlider, gd, axisOpts, opts) {
 }
 
 function drawGrabbers(rangeSlider, gd, axisOpts, opts) {
+    if(gd._context.staticPlot) return;
+
     // <g grabber />
     var grabberMin = Lib.ensureSingle(rangeSlider, 'g', constants.grabberMinClassName);
     var grabberMax = Lib.ensureSingle(rangeSlider, 'g', constants.grabberMaxClassName);
@@ -619,8 +623,6 @@ function drawGrabbers(rangeSlider, gd, axisOpts, opts) {
     handleMax.attr(handleDynamicAttrs);
 
     // <g grabarea />
-    if(gd._context.staticPlot) return;
-
     var grabAreaFixAttrs = {
         width: constants.grabAreaWidth,
         x: 0,