Reset scrollpane when setting response text.

Change-Id: I43836666b447b4b8118d9bb620461eb2a55b6d5b
Fixes-Issue: CLIENT-516
Reviewed-on: http://gerrit.dmdirc.com/3628
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>
Fix broken list selection model implementation.

Change-Id: I70c7ae244e5a70422dde66cef1fc9f99895fe227
Fixes-Issue: CLIENT-515
Reviewed-on: http://gerrit.dmdirc.com/3630
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>