Remove checkable property and MouseArea in favor of onClicked on the button
Remove checkable property and MouseArea in favor of onClicked on the button

It turns out, setting checkable: true causes binding breakage. Without
checkable, checked still works and we can use onClicked of the button
directly.

hmflash/Cura,fieldOfView/Cura,hmflash/Cura,ynotstartups/Wanhao,fieldOfView/Cura,Curahelper/Cura,ynotstartups/Wanhao,Curahelper/Cura