fix(explore): Reset values in TextControl only when datasource changes (#13211)

* Reset values in TextControl only when datasource changes

* Fix undefined error

superset-frontend/src/explore/components/controls/SelectControl.jsx

@@ -247,6 +247,7 @@ export default class SelectControl extends React.PureComponent {
       isMulti &&
       optionsRemaining &&
       Array.isArray(this.state.value) &&
+      Array.isArray(value) &&
       !!value.length
     ) {
       assistiveText = optionRemaingText;