Constrain the dialog header/body layout so very long file paths don't push
or wrap the dialog controls. Results: the title is truncated with an
ellipsis but the full name is available on hover.
- CSS: add grid-template-columns and min-width:0 to dialog/body; force
unified-dialog-header to avoid wrapping and set unified-dialog-text
flex-basis:0; truncate h2 with overflow/ellipsis.
- Svelte: add a title attribute to the h2 so the full filename is shown
on hover.
Christoph
baa226d536