This browser test checks that mentions go to alerts and talk page
messages go to messages popup. This also upgrades the MW-Selenium
version in Echo tests to 1.6.1.
Depends on MW-Selenium version 1.6.1 (See T114061)
Bug: T113081
Change-Id: I40a17500cdfb838420c04dc0b9268ba56515cc2c
The new oouified echo popup makes the tests invalid; this commit
rewrites those tests.
Also by doing this commit we are upgrading to Selenium 1.4.
Change-Id: I26215558768d55be449276c55b4b745c3a458ecb