bug#28605: 26.0.60; Part of leftmost character hidden

[martin rudalics]

> xg_get_gdk_scale and xg_get_scale differ in that the former only
> looked at GDK_SCALE, and the latter queries the widget for its scale
> factor, which will work better in environments where the scale factor
> is set via the GNOME configuration utility. Lars' changes also apply
> that scale in more places, resulting in eg scrollbars being at the
> correct position, rather than completely off to the side of the Emacs
> frame.

But we apparently still do not apply scaling everywhere, in particular
when displaying menus (Bug#27667 and Bug#28511).

martin