Add Platform_qtwidgets::init(), so we can share some code with ctors

src/qtwidgets/Platform_qtwidgets.cpp

@@ -27,6 +27,11 @@
 using namespace KDDockWidgets;
 
 Platform_qtwidgets::Platform_qtwidgets()
+{
+    init();
+}
+
+void Platform_qtwidgets::init()
 {
 #ifdef DOCKS_DEVELOPER_MODE
     if (qEnvironmentVariableIntValue("KDDOCKWIDGETS_SHOW_DEBUG_WINDOW") == 1) {

src/qtwidgets/Platform_qtwidgets.h

@@ -38,6 +38,8 @@ public:
     void tests_initPlatform_impl() override;
     void tests_deinitPlatform_impl() override;
 #endif
+protected:
+    void init();
 };
 
 }