[Adwaita] No 'default' button indicator
With dialogs, etc, there is no indication as to what is the 'default' button - i.e. the button that is activated with the return/enter key. At start there is a focus rect, but this can be 'tabbed' away.
In the following screenshot, which is the default button?
Steps to reproduce:
- Start GEdit
- Type some text
- Close GEdit
- Dialog appears - Save As... has focus
- Press tab key
- Save As... no longer has focus, so no focus/selection ring
- Press Return
- Save As... button is pressed, and save dialog appears
Most desktops (KDE, Windows, macOS) indicate the 'default' button somehow - different colour, border, etc. The default button can be different to the widget that currently has focus - as can be seen by the screenshot above, because one of those does receive the return/enter key.
Perhaps a bold font should be used to indicate the default?
This is basically the same issue as the Yaru theme had - see https://github.com/ubuntu/yaru/issues/306