Clear Active Tabs per JJ21112

Usage:
- Pin the extension to your toolbar, then using customize toolbar to move it wherever you would like
- To edit the key-bind go to Manage Extensions > Gear Icon > Manage Extension Shortcuts
- To edit the main/check icons you can upload your own image by going to Manage Extension > Options

Features:
- Clears all active tabs on button press or shortcut in your focused workspace (customizable)
- Doesn't clear pinned/essential tabs (obviously)
- If you are on a pinned tab when you press the button or shortcut it keeps you there // if you are on an active tab it keeps you on that active tab and doesn't clear it

**Known bugs** -- I am not adding support to delete tab groups until it become an official feature for Zen Browser

**To do** -- Add a feature where for 5 seconds after the button/shortcut press you can press it to restore the tabs it just deleted