Terminal: Enable reflow of live buffer

Fixes: QTCREATORBUG-32648
Change-Id: I525bc820b15586c2806e817c09808afdc4dcb762
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/solutions/terminal/terminalsurface.cpp

@@ -192,6 +192,7 @@ struct TerminalSurfacePrivate
             vterm_state_set_palette_color(vts, i, &col);
         }
 
+        vterm_screen_enable_reflow(m_vtermScreen, true);
         vterm_screen_reset(m_vtermScreen, 1);
     }