refactor(e2e): use OpenCalculator() where possible

refs #609

e2e/parallel-structures.e2e-spec.ts

@@ -31,9 +31,9 @@ describe("Parallel structures - ", () => {
                 await browser.pause(200);
         });
 
-        it("check calculated parameter remains the same when copying a structure", async () => {
-                // open "fish ladder: cross walls" calculator
-                await openCalculator(10, navBar, listPage);
+    it("check calculated parameter remains the same when copying a structure", async () => {
+        // open "fish ladder: cross walls" calculator
+        await openCalculator(10, navBar, listPage);
 
                 // check L in first structure calc toggle is not checked
                 const L1 = await calcPage.getInputById("0_L");