Vcs: Move responsibility to set editor parameters to editor factory

So it doesn't need to be named twice in the editor factory setup.

This intentially includes a de-optimiztion: storing the parameters
by value, not by pointer. That's more natural, does not need to
keep the parameters alive on the caller side, and it's uncritical
in this context.

Change-Id: I92867d3f2f75c38911ae82d3eeb4759cba71b723
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/perforce/perforceplugin.cpp

@@ -381,8 +381,7 @@ PerforcePluginPrivate::PerforcePluginPrivate()
     m_settings.fromSettings(ICore::settings());
 
     // Editor factories
-    new VcsSubmitEditorFactory(&submitParameters,
-        []() { return new PerforceSubmitEditor(&submitParameters); }, this);
+    new VcsSubmitEditorFactory(submitParameters, [] { return new PerforceSubmitEditor; }, this);
 
     const auto describeFunc = [this](const QString &source, const QString &n) {
         describe(source, n);