Browse to files page is not waiting for files

[C0rby]

During the ci run for this pr owncloud/ocis#638 I was getting lots of errors saying this:

Error while running "fail" command: Failed [fail]: (An error occurred while running .getAttribute() command on <//div[contains(@class, "file-row-name")][span/text()='lorem' and span/text()=".txt"]/ancestor::div[@data-is-visible="true"]//div[contains(@class, "file-row-name")]>: undefined; undefined)
           at NightwatchAPI.<anonymous> (/srv/app/phoenix/tests/acceptance/pageObjects/FilesPageElement/filesList.js:270:25)
           at processTicksAndRejections (internal/process/task_queues.js:86:5)

I did some debugging and found out that the browse to page list wasn't waiting for the files list.