This removes the min and max size properties from the YouTube "Manage
Broadcast" dialog. Such values depend on the actual content or very
precise layout management, making hardcoded values prone to being
incorrect. To avoid incorrect values we should avoid these settings on
top level widgets/windows.
This pattern can lead to crashes on Wayland compositors like
GNOME which are strict about these values being correct.
The helper link associated with starting a scheduled broadcast was not
helpful, as it linked to developer API documentation. Instead, have the
helper widget pop up a tooltip so the user understands what it is doing,
and adjust the wording slightly so that the user knows it's a setting
primarily used for scheduled broadcasts (normal streams always start
right away)
