Panorama Tab Groupspor projectdelphai

New Features/Changes
==================
1. You can now send tabs to other groups through the context menu! Just right click on a tab and send to another group :) Just an FYI, for now you can technically right click and send the Panorama view to another tab. Just close the view and everything will fix itself.
1. Tab groups now include the group ID next to the tab count. This is more for development/debugging but it might help you figure out which group to send a tab to (if you haven't named any yet).
1. Added Polish translations thanks to @marsjaninzmarsa, French translations thanks to @lionel-bijaoui, and Korean translations thanks to @hong620
1. Added Russian translations and plural forms thanks to David Gurk

Small changes/bug fixes
==================
1. Probably the biggest fix this release was fixing the bug where you couldn't save a backup of your groups. It was a simple problem, but hard to find, a missing html tag introduce back in v0.8.7 :( should be good to go now though!
1. During developing PTG and updating firefox, the update page won't open up. It will only open when there's a new release of Panorama Tab Groups.
1. A bunch of refactoring thanks to @Bareus :)

Known Bugs/Issues
==================
1. Group IDs always increment and never decrement after closing a group so if you've been using PTG for a while, I'm sure your IDs will be very high. I'll be fixing that soon, should be an easy fix.
1. I'm sure many translations broke with the new plural rules. Please take a look at the bottom of [this page](https://github.com/projectdelphai/panorama-tab-groups/blob/master/CONTRIBUTION.md#translations) to learn how to add plural rules to fix any broken translations.

Thanks for waiting and supporting this project :) As always, suggestions are welcome [here](https://github.com/projectdelphai/panorama-tab-groups/issues). We're especially looking for translations so please help if you can! If you're not sure how exactly to submit a pull request, you can just translate every message line [here](https://github.com/projectdelphai/panorama-tab-groups/blob/master/src/_locales/en/messages.json) and drop it in an issue and I'll put it in the code.