extend battery names to be more fine-grained

[danirabbit]

Problem

We have 16px of width in symbolic icons and 24px and 38px vertically in color icons to work with for battery levels, but we're currently only using 4 levels. We could be providing much more fine-grained battery levels if we wanted

Proposal

If we stretched the 48px battery icons a couple pixels, we'd have numbers divisible by 8 instead. We could be twice as accurate in showing battery levels

Prior Art

The freedesktop spec only includes battery-low (defined as 20%) and battery-caution (defined as 40%)—Which are apparently being used incorrectly right now. The other icon names we're currently using good, full, and empty are just convention from GNOME.

[NikoKrause]

Adwaita included als more fine-grained battery icons recently: https://gitlab.gnome.org/GNOME/adwaita-icon-theme/-/tree/master/Adwaita/scalable/status

[hanaral]

So are we doing this in tens?

[danirabbit]

Gonna move this to the power indicator since it's the only place battery icons are used

[danirabbit]

Symbolics are merged now. So we have a couple options for device icons in the menu. We can either:

• make all the full color equivalent icons in 48px and 32px
• Use the symbolic icons in the row instead of overlaying a color icon
• Follow system settings and use a levelbar

I'm honestly inclined to either do the levelbar or the symbolic icon because it's so much less work. Maybe in GTK4 we can also do some fancy custom widgets to do a more compact design like:

--

MacOS example of using symbolic icon in the row:

System Settings uses levelbars: