Unit test for issue 3721

Change-Id: Ifc1e3a8c60576c0626098280d1eb93dea7fb7a3d
Reviewed-on: http://gerrit.dmdirc.com/839
Reviewed-by: Gregory Holmes <greg@dmdirc.com>
Automatic-Compile: Chris Smith <chris@dmdirc.com>

Update FEST
Move UI test harness classes to plugins module
Fix a couple of broken ui unit tests

Change-Id: I12624ecd8c568294e06c304faf522bdc1da366c2
Reviewed-on: http://gerrit.dmdirc.com/454
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>
Tested-by: Shane Mc Cormack <shane@dmdirc.com>