chore: adding danish localization support

[Mats-Jakobsson]

No description provided.

[Mats-Jakobsson]

@ZhijieZhang - I saw that you have approved previous PR:s, could we get a couple of eyes on this? Thanks. If not you, do you know who to contact to get danish in? Thanks in advance.

[NoftScarlet]

Thank you for the pull request, @Mats-Jakobsson ! Looks like trivial a change to the code but nice to have.
Hey @mparizeau-pdftron and @bollain would you mind taking a look at the PR? Thanks!

[bollain]

hi @Mats-Jakobsson, thanks for making this PR!

I have merged this internally in the WebViewer solution, and it will be available in the nightly 11.1 release starting tomorrow.

Are you currently building the UI from this repo or downloading it via NPM?

[bollain]

@Mats-Jakobsson - looking further into this, the PR introduces a number of keys that are not present in other languages. Are these specific to your fork of WebViewer UI? If this is the case, we cannot merge them to our dev branches as they are specific to your fork. However, we can add Danish as an option and include translations for all the default keys used in WebViewer.