Fixes: Introduce a cpp settingspage containing file naming conventions (lower case and suffixes). Reorder VCS settings pages.

Task: 241959, 248085

RevBy: Optics/Naming checked by con
Details: Give IOptionPage an id() to differentiate from trName(). Make showOptionsDialog return a bool (applied) and give it an optional parent. Change Cpp and form class wizards, give them a Configure... button to change those settings.

src/plugins/cpptools/completionsettingspage.cpp

@@ -47,7 +47,12 @@ CompletionSettingsPage::~CompletionSettingsPage()
     delete m_page;
 }
 
-QString CompletionSettingsPage::name() const
+QString CompletionSettingsPage::id() const
+{
+    return QLatin1String("Completion");
+}
+
+QString CompletionSettingsPage::trName() const
 {
     return tr("Completion");
 }