Add translation for "Issues for child elements" heading

[rumata28]

When there are issues found by lint rules on a Pool element, a header "Issues for child elements" is added, and that header is not translatable.

PS: I also fixed really minor typos in some of the code comments, and name of one local variable.

[CLAassistant]

All committers have signed the CLA.

[barmac]

Hi, thanks for your submission. However, until you sign the CLA, we cannot look into the changes. It looks that the commit was pushed with a non-GH email.

[rumata28]

Hi, signed it, but it is still "pending"///

[barmac]

It looks like you need to change the commits to use your GitHub email address: https://stackoverflow.com/questions/3042437/how-can-i-change-the-commit-author-for-a-single-commit
Notice that in the PR's commit history, your GitHub handle is not linked to the commits.

[rumata28]

yeah.. thanks. updated commit e-mail to match my account.

[nikku]

Thanks, nice little fix, and good cleanups along the way, too!

[nikku]

Released via v0.22.1.