Fix terminal keys not working
Otherwise it throws something like:
"Could not convert argument 0 at"
"pressKey@qrc:/TerminalPage.qml:413"
"pressKey@qrc:/TerminalKeyToolBar.qml:38"
"expression for onClicked@qrc:/TerminalKeyToolBar.qml:132"
qrc:/TerminalPage.qml:413: TypeError: Passing incompatible arguments to C++ functions from JavaScript is not allowed.