Migrate all users to using the InputModel.

This saves getting the FS and suffering the barrage of warnings
related to auto-closeable resources.

This means each test doesn't have to set it up and tear it down
manually (although only one actually did bother to tear it down :)).

Remove existing auto commands dialog model.

Change-Id: I62a9d05c94a3e2d31466a04c775f3afbddb09cdc
Reviewed-on: http://gerrit.dmdirc.com/3995
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: I6b07117bb136b3817a92cb9c31dfd3222fc52a7c
Reviewed-on: http://gerrit.dmdirc.com/3969
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: I0ef123c502f77f4438e8afc62490ff4d364d7fa4
Reviewed-on: http://gerrit.dmdirc.com/3968
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: If9b6a83bfae4bdb8b83985874fc3610feb6b6512
Reviewed-on: http://gerrit.dmdirc.com/3967
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Also test.

Change-Id: Iea8cfe088b98782d7e7ccbdb3d862ab47dbe6273
Reviewed-on: http://gerrit.dmdirc.com/3955
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>