small fixes

client/src/components/ElementConnector.tsx

@@ -99,6 +99,7 @@ export default class ElementConnector {
 
     return (
       <ReactElement 
+        key={idx}
         id={id + '@' + (idx || 0)}
         dependencies={dependencies}
         actions={actions || {}}

client/src/tests/elements/Pie.test.tsx

@@ -61,7 +61,7 @@ describe('Pie', () => {
     expect(pieChartElement.length).toBe(1);
   });
 
-  it('Rows == 4', () => {
+  it('Cells == 4', () => {
     let cells = TestUtils.scryRenderedComponentsWithType(pie, Sector);
     expect(cells.length).toBe(4);
   });