chore: Tab title to be empty when creating a new tab (#12773)

* Remove unwanted package lock

* Edit on new and autofocus

* Update test

* Remove autofocus

superset-frontend/src/dashboard/components/gridComponents/Tab.jsx

@@ -208,9 +208,12 @@ export default class Tab extends React.PureComponent {
           <div className="dragdroppable-tab" ref={dragSourceRef}>
             <EditableTitle
               title={component.meta.text}
+              defaultTitle={component.meta.defaultText}
+              placeholder={component.meta.placeholder}
               canEdit={editMode && isFocused}
               onSaveTitle={this.handleChangeText}
               showTooltip={false}
+              editing={editMode && isFocused}
             />
             {!editMode && (
               <AnchorLink