Tidy up the URL config panel.

Change-Id: If133413aa2f2bcd35d3915b15c27986885afff10
Reviewed-on: http://gerrit.dmdirc.com/3132
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager
Fix some oddities in the new PMD

Change-Id: I36aaf1c69dfc534a66f921b774f2614092faed68
Reviewed-on: http://gerrit.dmdirc.com/3131
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager