view: Disable selection mode if enabled when hidden
view: Clear search text when search mode is enabled
view: Set custom title of header as property

This is to remove a compiler warning. The setter function for custom
title is not properly annotated.
stack: Set custom title of header as property

This is to remove a compiler warning. The setter function for custom
title is not properly annotated.
date-entry: Destroy popup when a day is clicked

Instead of setting visibility when the arrow button is toggled, create
a new one everytime the button is active, then destroy it when the
button loses focus, the button becomes inactive, or a day is selected.