Show pagination format error

[pontus-osterdahl]

This pull requests catches the number format exception when malformed pagination is attempted and displays a error message instead of the stacktrace.

• Catch NumberFormatException and print error message
• Add paginationFormatError message

Fixes #5658

[solth]

Thanks for the pull request. It does indeed fix the linked issue (there is just one small error in the German translation).

This solution does emphasize the importance of fixing #3392, however, because the "Apply" button in the pagination panel is unreachable after closing the pagination start value error message. I guess the optimal solution would be to display any errors (pagination, validation or other errors) in a popup dialog instead, but that should probably be done when dealing with #3392.

[pontus-osterdahl]

Thanks for the review, comment and correction!
I was not aware of the issue with the "apply" button. I did my manual testing with both Metadata and Pagination panel open and here the apply button still appears after closing the error message. After minimizing the Metadata panel and closing the error message the button indeed disappears...