TT#56376 selenium: more work on edit peak times

controller_billing.t:
- minor changes to finally open peak times reliably

Change-Id: Idea20c812ca746ace3eec95ffeb455828b79c13c
(cherry picked from commit c56be67d54)

t/selenium/controller_billing.t

@@ -216,8 +216,8 @@ ok($d->wait_for_text('//*[@id="billing_profile_table"]/tbody/tr/td[2]', $billing
 $d->move_and_click('//*[@id="billing_profile_table"]/tbody/tr[1]//td//div//a[contains(text(), "Off-Peaktimes")]', 'xpath', '//*[@id="billing_profile_table_filter"]//input');
 
 diag("Edit Wednesday");
-ok($d->find_element_by_xpath('//*[@id="masthead"]/div/div/div/h2[contains(text(), "Off-peak-times")]'), "We are on the correct Page");
-$d->move_and_click('//*[@id="content"]//td[contains(text(),"Wednesday")]/..//a[text()[contains(.,"Edit")]]', 'xpath', '//*[@id="content"]//td[contains(text(),"Monday")]');
+ok($d->find_element_by_xpath('//*[@id="masthead"]//div//h2[contains(text(), "Off-peak-times")]'), "We are on the correct Page");
+$d->move_and_click('//*[@id="content"]//table//tr[3]/td//a[text()[contains(., "Edit")]]', 'xpath', '//*[@id="masthead"]//div//h2[contains(text(), "Off-peak-times")]');
 ok($d->find_text("Edit Wednesday"), 'Edit dialog was opened');
 
 diag("Fill in invalid values");