Add new feedback dialog.

Change-Id: I3c7e88f6ed4e9afd6f4ed5e6040471b1329f6576
Depends-On: Id16ce13eac3bf4f359bd0d743cdd6041fc47bcaa
Depends-On: Ifc8ca757700db2dd19db89715e95f6c1df15e999
Reviewed-on: http://gerrit.dmdirc.com/3615
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>
Fix initial validation on new server dialog.

Change-Id: Ifc6056ed24715905f885baa1e514d3a5b88ae499
Reviewed-on: http://gerrit.dmdirc.com/3616
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>