ieframe: Fixed random test failures.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=16383

Your paranoid android.


=== w2000pro (32 bit webbrowser) ===
webbrowser.c:2972: Test failed: expected Invoke_COMMANDSTATECHANGE_NAVIGATEBACK_FALSE
webbrowser.c:2977: Test failed: expected Invoke_COMMANDSTATECHANGE_NAVIGATEFORWARD_FALSE
webbrowser.c:2972: Test failed: expected Invoke_COMMANDSTATECHANGE_NAVIGATEBACK_FALSE
webbrowser.c:2977: Test failed: expected Invoke_COMMANDSTATECHANGE_NAVIGATEFORWARD_FALSE
webbrowser.c:2972: Test failed: expected Invoke_COMMANDSTATECHANGE_NAVIGATEBACK_FALSE
webbrowser.c:2977: Test failed: expected Invoke_COMMANDSTATECHANGE_NAVIGATEFORWARD_FALSE