Support for copy & paste

[mum4k]

The tcell library seems to have added support for pasting into the terminal. We should investigate of copy&paste can now be supported and add it to termdash.

https://github.com/gdamore/tcell/blob/master/CHANGESv2.adoc

Related to #254 and #220.

[aomerk]

hey @mum4k , looks like it's fixed. Works fine with the integrated terminal of IntelliJ + zsh

[mum4k]

Thank you for reporting that this works in this terminal type @aomerk. Interestingly enough, this still doesn't seem to work for me on MacOS with iTerm. I can paste, but I cannot select any text to copy. Since I don't really understand why, it may be worthwhile keeping this issue open until we investigate it.

Could you explicitly confirm if you were able to also copy some text from a running Termdash app? If so, which widget did it work on? My failed attempts were when I was trying to copy some content from the Text widget.