It's not exactly clear what changed - gobject-introspection, gjs - but
the newly added gweather_condition_to_string_full() API no longer works
like it used to. The replacement code does look more idiomatic anyway,
so just fix the code without investigating the reason of the breakage.
https://bugzilla.gnome.org/show_bug.cgi?id=787423
Unlike pango_font_description_from_string(),
pango_font_description_set_family() requires a already properly
formatted font family string. The proper format is a comma seperated
list of font families, but we generated a "comma space" separated list.
Passing a incorrectly formatted font family string to pango seems to
cause wierd issues, where the wrong font is sometimes selected.
For example, this fixes a font selection issue on zh_TW.UTF-8 locale for
chinese characters, where previously the "Droid Sans" font was selected
instead of "Source Han Sans TW" even though fontconfig had placed
"Source Han Sans TW" before "Droid Sans".
https://bugzilla.gnome.org/show_bug.cgi?id=786868
If a source actor is set, use that for determining the arrow side (i.e.
whether the BoxPointer widget should expand in a certain direction).
This is better because it ensures that the popup is displayed on the
same monitor as the widget it originates from.
Without this, entering text with a vertically aligned input method
close to the bottom of a monitor would expand the BoxPointer downwards
on the monitor beneath it, instead of upwards, which is what one would
expect.
https://bugzilla.gnome.org/show_bug.cgi?id=786886
Now that full-sized window previews are allowed again it makes sense to
align the window previews with the pixel grid to prevent unscaled
windows from looking blurry in the overview.
