editors/feathernotes: update to 0.10.0

-Better (smooth) scrolling from inside the view, especially with touchpad.
-Don't try to save or restore window position under Wayland.
-When the window isn't active under Wayland, hide and show it again if the tray
icon is activated.
-Don't let QTextEdit's built-in undo/redo shortcuts cause a scroll jump when
there's nothing to undo/redo.
-Fixed compilation against old Qt versions.

(pin)