Prevents warning such as
qml/org/kde/plasma/components.3/mobiletextselection/MobileTextActionsToolBar.qml:62: TypeError: Cannot read property 'selectedText' of null
qml/org/kde/plasma/components.3/mobiletextselection/MobileTextActionsToolBar.qml:70: TypeError: Cannot read property 'selectedText' of null
qml/org/kde/plasma/components.3/mobiletextselection/MobileTextActionsToolBar.qml:78: TypeError: Cannot read property 'canPaste' of null