Merge pull request #3427

1ad2636 qt: Prevent non-functional GUI from popping up during Init (Wladimir J. van der Laan)

src/ui_interface.h

@@ -62,6 +62,8 @@ public:
 
         /** Force blocking, modal message box dialog (not just OS notification) */
         MODAL               = 0x10000000U,
+        /** Don't bring GUI to foreground. Use for messages during initialization */
+        NOSHOWGUI           = 0x20000000U,
 
         /** Predefined combinations for certain default usage cases */
         MSG_INFORMATION = ICON_INFORMATION,