Major refactor of the extension's source code and the pop-up window's interface.
- Complete overhaul of the popup user interface
- New "input groups" feature that allows converting and viewing multiple values at once
- Added keyboard shortcuts for navigating and interacting with the pop up interface
- Added help page to pop up containing the shortcuts list and various tips
- Invoking utime from the omnibox or context menu will now display the conversion result in a desktop notification, with an option to copy the value to your clipboard
- New icon