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/libs/utils/basevalidatinglineedit.h

@@ -72,6 +72,9 @@ public:
     QColor errorColor() const;
     void setErrorColor(const  QColor &);
 
+    // Trigger an update (after changing settings)
+    void triggerChanged();
+
     static QColor textColor(const QWidget *w);
     static void setTextColor(QWidget *w, const QColor &c);