#152 Fix Mech button active after deleting section

Author: rodriguez-facundo

webapp/components/definition/cellRules/NetPyNECellRules.js

@@ -643,6 +643,7 @@ export default class NetPyNECellRules extends React.Component {
             selected={sectionName == selectedSection}
             paramPath={[selectedCellRule]}
             handleClick={this.selectSection} 
+            onDelete={() => this.setState({ selectedSection: undefined })}
           />)
 
     } else if (page == "mechanisms" && Object.keys(model).length > 0 && model[selectedCellRule] && model[selectedCellRule].secs[selectedSection]) {

webapp/components/general/NetPyNEThumbnail.js

@@ -42,6 +42,7 @@ export default class NetPyNEThumbnail extends React.Component {
     if (this.props.handleClick && actionConfirmed) {
       // this.props.deleteMethod(this.props.name);
       this.props.deleteNetParamsObj({ paramPath: this.props.paramPath, paramName: this.props.name })
+      this.props.onDelete && this.props.onDelete()
     }
     this.setState({ dialogOpen: false });
   }