Update Strings.pl-PL.xaml

[FadeMind]

• translate new file strings
• adjust text

[Timthreetwelve]

Thank you!

[FadeMind]

@Timthreetwelve please review file and check if I missed some ENG strings from main EN-US file. I hope not. Thanks

[Timthreetwelve]

@FadeMind I did find four that need to be added.

Key	English Phrase
MsgText_AppUpdateClose	Clicking 'Yes' will close Windows Update Viewer.
MsgText_ErrorCaption	ERROR
MsgText_ErrorOpeningFile	Error opening {0}
MsgText_ErrorReadingFile	Error reading {0}

I'm glad that I checked. I found and corrected my own goof up in one of the strings.

Thanks again.

Tim

[FadeMind]

@Timthreetwelve new PR awaits