"close" button isn't aligned properly on long session names

[timoreimann]

When having a session name whose length exceeds a specific width, the "close" button (i.e., "x") appearing on mouse-over won't be aligned properly with the session name anymore in the list of stored sessions. Instead of being on the same vertical level, it'll be located slightly below.

[NathanGillis]

It do to the close button being a flot. Can change css to absolute position to fix issue.