Google Chat Thread Switcher

Once installed on Google Chrome, it allows you to select and go threads (topics) in Google Chat.

## Detailed explanation

Some Google Chat "Spaces" (used to be called "Chat Rooms") can have multiple threads, and some cannot. You can choose that when you create the Space.

This extension adds a drop-down list to a Space with multiple threads, where you can pick a Thread and move it around.

To complicate things, Google has changed the term "Thread" to "Topic." Following suit, I have changed this extension to display "Topic." But I don't want to change the extension name, so it remains "Google Chat Thread Switcher."

Further complicating, Google has implemented an additional "inline thread" feature for spaces that do not have threads (or rather multi-topic). Please do not confuse them.