Use active window frame manager.

Change-Id: I9b37249813c03941cdd410a5b225f3d710a72244
Reviewed-on: http://gerrit.dmdirc.com/3323
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>
Remove unused field.

Change-Id: I92c8f2d593bb5ab1eca3535761e9ecfb5e2ae3df
Reviewed-on: http://gerrit.dmdirc.com/3325
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>