3 of the DevTools windows not appearing when the Flutter IJ plugin is installed.

[jwren]

Of the 4 Dart DevTools tool windows, only the Inspector is appearing as present in the Flutter IntelliJ plugin

[jwren]

This is not resolved. The issue seems to stem from the dependency on the immediate existence of the version file, see flutter/flutter#142521

The fix will be to either

1. remove the version check,
2. or to return this check in an async manner to the IDEA platform.