FIX: Fix focus stealing from app when filament changes

At every filament related event, the old code would try to set the
keyboard focus to the "Device" tab, leading to a number of, either,
focus stealing events, or notifications if the desktop has focus
stealing prevention (like GNOME).

Disable the focus setting on Linux to prevent that focus stealing.

Closes: https://github.com/bambulab/BambuStudio/issues/3046

src/slic3r/GUI/MainFrame.cpp

@@ -1110,10 +1110,10 @@ void MainFrame::init_tabpanel()
             m_topbar->DisableUndoRedoItems();
         }
 #endif
-
+#ifndef __WXGTK__
         if (panel)
             panel->SetFocus();
-
+#endif
         /*switch (sel) {
         case TabPosition::tpHome:
             show_option(false);