Invalid RenamePattern error message displaying twice

[seijikun]

The Invalid RenamePattern error message is displaying twice in case of an invalid pattern when directly moving the focus from the renamePattern textbox to the searchLimit textbox.
This might be because of some strange focusing events since the SettingsPanels saveSettings() method is bount to the focusLost event of both, txtRenamePattern as well as txtSearchLimit.
I could imagine that when txtRenamePattern is loosing the focus while txtSearchLimit is gathering the focus, the save is triggered the first time and since an error message is displayed after that also txtSearchLimit is loosing it's focus and thus triggering the save a second time which then is leading to the error message being displayed a second time.