update size should show the delta update size instead of total
I'm often scared by the size of the estimated download size of a flatpak upgrade. An SDK update may seem to be about 600MB. However when I upgrade it's pretty fast.
If I upgrade via command line, it's clear that the data actually downloaded is small:
$ flatpak update
Looking for updates…
ID Arch Branch Remote Download
1. [✓] org.freedesktop.Platform x86_64 18.08 flathub 1,2 MB / 290,3 MB
2. [✓] org.freedesktop.Platform.Locale x86_64 18.08 flathub 16,9 kB / 315,9 MB
3. [✓] org.freedesktop.Sdk x86_64 18.08 flathub 9,2 MB / 595,5 MB
4. [✓] org.freedesktop.Sdk.Locale x86_64 18.08 flathub 16,9 kB / 319,3 MB
5. [✓] com.visualstudio.code.oss x86_64 stable flathub 35,5 MB / 68,6 MB
6. [✓] org.freedesktop.Platform.html5-codecs x86_64 18.08 flathub 63,4 kB / 2,9 MB
Updates complete.
ID Arch Branch Remote Download
1. [✓] org.gnome.Sdk x86_64 master gnome-nightly 1,8 MB / 692,3 MB
It seems that Software is showing the first installation size instead of the delta update size.