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/git/gitsubmiteditor.cpp

@@ -98,8 +98,8 @@ CommitDataFetchResult CommitDataFetchResult::fetch(CommitType commitType, const
  * option for staged files. So, we sort apart the diff file lists
  * according to a type flag we add to the model. */
 
-GitSubmitEditor::GitSubmitEditor(const VcsBaseSubmitEditorParameters *parameters) :
-    VcsBaseSubmitEditor(parameters, new GitSubmitEditorWidget)
+GitSubmitEditor::GitSubmitEditor() :
+    VcsBaseSubmitEditor(new GitSubmitEditorWidget)
 {
     connect(this, &VcsBaseSubmitEditor::diffSelectedRows, this, &GitSubmitEditor::slotDiffSelected);
     connect(submitEditorWidget(), &GitSubmitEditorWidget::show, this, &GitSubmitEditor::showCommit);