Proposal: modules reload

[Vladimir Prus]

Hello,
from time to run I run into a snag with QMTest. I start a gui, run a test and 
it fails. The test uses custom test class, and I decide there's problem with 
the test class itself. So I edit the module, but running gui does not notice 
that the module source has changed. I have to shutdown/restart QMTest,
which is not convenient. 

I propose that QMTest gui has a new command "reload modules", which
will use builtin "reload" function on all known extension modules or allow to
select modules to reload. 

If this idea is good from UI/functionality point of view, I can look at how it 
can be implemented in code. Opinions?

-- Volodya