Page scrolls when opening language selector

Was happening mostly on Firefox when ULS was in personal
position and you were logged out and allowed to change language.

Loading grid here already prevents graphical glitch and delaying
the click seems to prevent scrolling to wrong position.

Bug: 56937
Change-Id: Ie9acaa5a46fd903221d30c94dbc26a83355cdb64
Merge "Page scrolls when opening language selector"