Explore update button labels (#3534)

* resolve ui ambiguity

* resolve button name ambiguity

* update test

superset/assets/javascripts/explore/components/DisplayQueryButton.jsx

@@ -93,7 +93,7 @@ export default class DisplayQueryButton extends React.PureComponent {
       <ModalTrigger
         animation={this.props.animation}
         isButton
-        triggerNode={<span>Query</span>}
+        triggerNode={<span>View Query</span>}
         modalTitle={t('Query')}
         bsSize="large"
         beforeOpen={this.beforeOpen}