cc-input-text (multi): prevent text area behavior on mac os while doing an implicit submit

[Galimede]

When you're in a cc-input-text in mutli mode, you can Ctrl+Enter to do an implicit submit.
However, in a textarea on mac os, it selects the last word and makes the "right click menu" appear.
Thus causing weird behavior when doing an implicit submit on mac os within this specific mode.

We need to find a way to prevent this case from happening.