Merge windows per Profile
The Merge Window Extension is intended to effectively reduce the number of windows and memory consumption by merging multiple windows in the browser.
The extension detects a left click or the shortcut key "Control (Command) + M" and performs the following actions
* Merge all windows of the same profile
* Merge all incognito windows of the same profile
（If allowed to run in incognito mode）
For more information on allowing execution in incognito mode
see https://support.google.com/chrome/a/answer/13130396.
Note:
To protect privacy, regular windows and secret windows will not be merged.
