Allow to globally disable the kill button

(only needed in swift pilot client so far)

src/blackgui/components/dbmappingcomponent.cpp

@@ -134,6 +134,10 @@ namespace BlackGui
             // vPilot
             this->initVPilotLoading();
 
+            // overlay
+            this->showKillButton(false);
+
+            // user changes
             m_swiftDbUser.setNotifySlot(&CDbMappingComponent::ps_userChanged);
         }