Environment Details:
Application Name: Visual Studio Code
Application Version: 1.38.1 (user setup)
Commit: b37e54
Electron: 4.2.10
Node.js: 10.11.0
OS: Windows_NT x64 10.0.18362

Repro steps:

1. Go to Extensions
2. Pick any ol' extension (confirmed on Java Extension Pack)
3. Launch screen reader, like NVDA
4. Use keyboard to select "Install" button
5. Hit on keyboard

Expectation:
Toast content are read by the screen reader, as they're the most pertinent to the user's next action.

Reality:
Lots of intermediate text is read first, finally getting to the toast that's been waiting. Should have higher aria priority.