Introducing "Missing without Unreviewed" filter in Pontoon

[Matjaz Horvat]

Hi,

We've just added a new "Missing without Unreviewed" filter to Pontoon,
which lists all missing strings that don't have any unreviewed suggestions
or fuzzy strings present.

The filter should be particularly useful when you have multiple missing
strings and many of them already have suggestions. Now you can list only
the ones for which you still need to submit suggestions.

You can find the new filter in the Extra section:
https://pontoon.mozilla.org/projects/all-projects/all-resources/?extra=missing-without-unreviewed

Thanks to Vishal <https://github.com/vishalcr7/> for the implementation!

We hope you'll find the new feature useful!

Thanks,
Matjaž