Add "Clipboard Convert" button to GUI #135
Description
There is a common workflow of pasting source code into the left pane, clicking convert, and then clicking the Copy button on the right pane. This can be streamlined with a new "Clipboard Convert" button that pastes the contents of the clipboard into the input pane, converts, and automatically copies the output back into the clipboard. It should show the values in the input/output editors so that the user can confirm the conversion, as well as show any dialogs for warnings, etc.