fix: DEV-1563: Fix editing of textarea result (#469)

* fix: DEV-1563: Fix editing of textarea result

* fix: DEV-1563: Protect shortcuts from adding text to nonexistent elements

Author: Gondragos

src/components/HtxTextBox/HtxTextBox.js

@@ -94,7 +94,7 @@ export class HtxTextBox extends React.Component {
   }, 100);
 
   renderEdit() {
-    const { className = "", rows = 1, onlyEdit, name, onFocus, ...props } = this.props;
+    const { className = "", rows = 1, onlyEdit, name, onFocus, onChange, ...props } = this.props;
     const { height, value } = this.state;
 
     const inputProps = {

src/tags/control/TextArea/TextArea.js

@@ -226,6 +226,9 @@ const Model = types.model({
     onShortcut(value) {
       if (isFF(FF_DEV_1564_DEV_1565)) {
         if (!lastActiveElement || !lastActiveElementModel || !isAlive(lastActiveElementModel)) return;
+        // Do nothing if active element is disappeared
+        if (self === lastActiveElementModel && !self.showSubmit) return;
+        if (!lastActiveElement.parentElement) return;
 
         lastActiveElement.setRangeText(value, lastActiveElement.selectionStart, lastActiveElement.selectionEnd, "end");
         lastActiveElementModel.setValue(lastActiveElement.value);