- ContentPage now stretches to fill the window
- root StackPanel replaced by a 3-row Grid (Auto, *, Auto)
so the post list absorbs the middle band and the detail
panel sits below
- detail panel inner StackPanel replaced by a Grid (Auto,
Auto, Auto, *, Auto) so the AvaloniaEdit TextEditor fills
all remaining width and height; MinHeight=320 keeps a
sane floor on tiny windows
Paul Schneider
bd3dba0089