ParametersI.h: Work around Ice bug in ParametersIPtr typedef
templates/combined.vm: Work around Ice bug in ${PojoI}Ptr typedef

I'm not happy with this patch.  The seemingly arbitrary escaping
of the leading '#' seems wrong, even if it does result in correct
generated output.  Is there a better way to do this?
OmeroCpp: Use IceInternal::Handle everywhere for Ice >= 3.4

This replaces the use of IceUtil::Handle, which will continue
to be used for Ice 3.3 and earlier.
Add button to edit channels.
Add channel edit to display and implement various loaders.
Fix layout issue in channels edit component.
Fix resizing issue.
Remove unused import.
Move method to correct service.
Rename method.
Fix call invocation and implement method to load pixels.
Modify method signature.
Remove unused import.
update components after updating the channels.
Fix update call.
Update agents listening to channels update.
Update metadata viewer after changing channels names.
Fix warning display.
Fix problem while switching between channels

(close #100041 and #100096)
Pas different parameter while viewing plate.