Rename method as I asked on MR but didn't do. + make method working

CMakeLists.txt

 cmake_minimum_required(VERSION 3.16 FATAL_ERROR)
-set(PIM_VERSION "5.18.41")
+set(PIM_VERSION "5.18.42")
 
 project(KIdentityManagement VERSION ${PIM_VERSION})
 

src/identitycombo.cpp

@@ -194,7 +194,10 @@ IdentityManager *IdentityCombo::identityManager() const
     return d->mIdentityManager;
 }
 
-void IdentityCombo::showDefault(bool showDefault)
+void IdentityCombo::setShowDefault(bool showDefault)
 {
-    d->showDefault = showDefault;
+    if (d->showDefault != showDefault) {
+        d->showDefault = showDefault;
+        d->reloadCombo();
+    }
 }

src/identitycombo.h

@@ -42,7 +42,7 @@ public:
     void setCurrentIdentity(const Identity &identity);
     void setCurrentIdentity(uint uoid);
     /// Show (default) on the default identity. By default this behavior is disabled.
-    void showDefault(bool showDefault);
+    void setShowDefault(bool showDefault);
     /**
       Returns the IdentityManager used in this combo box.
       @since 4.5