fix runsPerLHCPeriod export test

Author: GuustMetz

test/public/runs/runsPerLhcPeriod.overview.test.js

@@ -215,7 +215,7 @@ module.exports = () => {
         const targetFileName = 'data.json';
 
         // First export
-        await pressElement(page, EXPORT_RUNS_TRIGGER_SELECTOR, true);
+        await pressElement(page, EXPORT_RUNS_TRIGGER_SELECTOR);
         await page.waitForSelector('select.form-control');
         await page.waitForSelector('option[value=runNumber]');
         await page.select('select.form-control', 'runQuality', 'runNumber', 'definition', 'lhcPeriod');