Sometimes it's necessary to convey more information about the window to screen reader users only (simply putting everything to the window title might be unnecessarily noisy).
For example, Chromium uses that technique to tell screen reader users that the window is in incognito mode (the incognito window looks differently and doesn't have «incognito» in the title, but for blind users the screen reader will announce that it's incognito).
* feat: Implement BrowserWindow.moveAbove(mediaSourceId)
BrowserWindow.{focus,blur,moveTop}() are not enough in some
situations. For example when implementing an overlay that
follows another window that can lose focus. In that case
it is useful to move the overlay above the tracked window.
sourceId is a string in the format of DesktopCapturerSource.id,
for example "window:1869:0".
Notes: Added BrowserWindow.moveAbove(mediaSourceId)
https://github.com/electron/electron/issues/18922
* feat: Implement BrowserWindow.getMediaSourceId
Return the Window id in the format of DesktopCapturerSource's id.
For example "window🔢0".
https://github.com/electron/electron/issues/16460
Notes: Added BrowserWindow.getMediaSourceId
