Change WorkspaceSvg svgGroup_ to getSvgGroup()

https://github.com/google/blockly/blob/blockly-v11.2.2/core/workspace_svg.ts#L708

Author: mjgallag

appinventor/blocklyeditor/src/blocklyeditor.js

@@ -1137,7 +1137,7 @@ Blockly.BlocklyEditor['create'] = function(container, formName, readOnly, rtl) {
   workspace.flyout_ = workspace.getFlyout();
   workspace.addWarningIndicator();
   workspace.addBackpack();
-  Blockly.browserEvents.bind(workspace.svgGroup_, 'focus', workspace, workspace.markFocused);
+  Blockly.browserEvents.bind(workspace.getSvgGroup(), 'focus', workspace, workspace.markFocused);
   // Hide scrollbars by default (otherwise ghost rectangles intercept mouse events)
   workspace.flyout_.scrollbar_ && workspace.flyout_.scrollbar_.setContainerVisible(false);
   workspace.backpack_.flyout_.scrollbar_ && workspace.backpack_.flyout_.scrollbar_.setContainerVisible(false);

appinventor/blocklyeditor/src/workspace_svg.js

@@ -198,7 +198,7 @@ Blockly.WorkspaceSvg.prototype.addWarningIndicator = function() {
     }
     this.warningIndicator_ = new Blockly.WarningIndicator(this);
     var svgWarningIndicator = this.warningIndicator_.createDom();
-    this.svgGroup_.appendChild(svgWarningIndicator);
+    this.getSvgGroup().appendChild(svgWarningIndicator);
     this.warningIndicator_.init();
   }
 };
@@ -911,7 +911,7 @@ Blockly.WorkspaceSvg.prototype.requestRender = function(block) {
         this.pendingRender = null;
       }
     }.bind(this);
-    if (this.svgGroup_.parentElement.parentElement.parentElement.style.display === 'none') {
+    if (this.getSvgGroup().parentElement.parentElement.parentElement.style.display === 'none') {
       this.pendingRender = true;
     } else {
       this.pendingRender = setTimeout(this.pendingRenderFunc, 0);