Uncheck Engineering notation checkbox on Scientific selection

In Calc, the Engineering notation checkbox in the Sidebar Properties
deck Number Format panel can show checked when the cell number format
does not contain engineering notation.

Change-Id: Ia26fc430aecd7af2e0f614bf9314d99f8408e690
Reviewed-on: https://gerrit.libreoffice.org/46650Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>

sc/source/ui/sidebar/NumberFormatPropertyPanel.cxx

@@ -214,6 +214,7 @@ void NumberFormatPropertyPanel::NotifyItemUpdate(
                     mpBtnThousand->Check(false);
                     mpBtnEngineering->Show(bIsScientific);
                     mpBtnEngineering->Enable(bIsScientific);
+                    mpBtnEngineering->Check(false);
                     mpBtnNegRed->Enable();
                     mpFtDenominator->Show(bIsFraction);
                     mpEdDenominator->Show(bIsFraction);