Writing quotes inside a string produces double quotes

If you have something like

Text {
    text: "Quit"
}

and want to modify text property to "Don't quit", writing the single quote ' produces '' instead, so you'll end up with

Text {
    text: "Don''t Quit"
}

If the cursor is inside a quoted string, this should not happen.

Similarly, having 'foo' and typing " inside there produces "" instead. This still makes sense, as you usually want to match double quotes even if inside a a string.