Console pane context menu copy only works in the history - Windows

Positron Version:

Positron Version: 2024.02.0 (system setup) build 2024.02.0-1535
Code - OSS Version: 1.86.0
Commit: 1478e597a716c434509a1ff8f7e0e43dbf420cb2
Date: 2024-02-15T02:51:08.089Z
Electron: 27.2.3
ElectronBuildId: undefined
Chromium: 118.0.5993.159
Node.js: 18.17.1
V8: 11.8.172.18-electron.0
OS: Windows_NT x64 10.0.22631

Steps to reproduce the issue:

1. Type a few commands into the console (Python or R)
2. Select some text from a previous command or result
3. Right click to bring up context menu
   Copy is available

4. Start typing a new command (but don't press enter)
5. Select some text of the new command on the input line
6. Right click and bring up context menu
   Copy is not available

What did you expect to happen?

Copy to be available where selecting text

Notes

This appears to be Windows only.. it works as expected on MacOS
Behavior is same for Python and R
Follow-on to #123

Start at the console pane's context-menu handling and reproduce the steps on Windows with a fresh command selection, comparing it with a selection from history. Done means the Copy action is available for selected text on the input line for both Python and R consoles, as it is on macOS.