[orca-list] Orca fail to read current terminal on start.

[Cameron Wong <hgneng gmail com>]

Dear developers,

I find that Orca fail to read current terminal on start.

Environment:
OS: Ubuntu 20.04 daily build
Speech-dispatcher version: 0.91
Also reproduced in Ubuntu 18.04 (so it should be exist for a long time)

Reproduce steps:
1. shutdown Orca by press SUPER+ALT+s if its on
2. open terminal by press CTRL+ALT+t
3. start Orca by press SUPER+ALT+s
4. run `ls`, Orca will not read file list output
5. create a new tab by SHIFT+CTRL+t or just change to another tab if exists. Then switch back to previous tab and run `ls`, Orca will read output correctly.

Let me know if more information is needed for debugging this issue.

Thanks a lot!

Cameron