TCP session data automatically reset to "binary"

1. create a new TCP session, set Data type to "text", set host to something like 1.1.1.1
2. click connect
3. open session property
4. change any settings or not, click save
5. open session property
6. Data type automatically reset to "binary"

Reproduce the issue in WindTerm by creating a TCP session, selecting text data, connecting, and saving the session properties. Inspect the TCP session property save and reload path; done means the selected text data type remains text after reopening the properties.

Written by the indexing model from the issue text.