feat: enable 24.04 upgrades for 22.04

[mmstick]

Currently testing. It would be ideal to merge this as master_jammy and then allow master to target >=24.04. Then we can drop the GTK library entirely on 24.04 and make changes that are required by pop-upgrade integrations into cosmic-settings.

[jacobgkau]

When running through this for the first time in a virtual machine, I saw the first upgrade dialog open with a lot of empty space at the bottom:

Let's also try to better match the text to what's shown in the Figma file linked in #379:

In particular, the first line shouldn't be there, and the paragraph doesn't need to be a bullet point. Are we able to have hyperlinks in this dialog?

The second dialog also looks identical to the first at this point, where they should be different dialogs per the mockup.

[jacobgkau]

I'm assuming Michael's aware of these things, but just to keep a record of where it's at:

• The link in the dialog isn't rendering as a link (and the dialog still has blank space at the bottom).

• Looks like this is currently stuck in a loop going to the first dialog. The button always says "Start Upgrade", and the progress bar always says it's downloading.

[jacobgkau]

The good news is that this is generally working now!

Both of the upgrade dialogs still have a lot of empty space beneath them when opened:

I checked a physical machine to confirm this isn't just a quirk with my VM, but it happened there, too:

So that will need to be fixed.

[jacobgkau]

Also, this is the main page in the Figma mockup:

This is what it actually looks like right now:

It looks like we need to add a period to both the subtext for the main upgrade row and the subtext for the recovery upgrade row (and change "keeping" to "retaining" in the latter).

@pop-os/ux Would you be open to making the subtext for the upgrade Includes the COSMIC desktop environment. instead of Includes COSMIC desktop environment.? The latter sounds a little broken to me without the definite article.

[jacobgkau]

That fixed the oversized dialogs:

The first one has to scroll now, but that's better than having all that empty space.

[jacobgkau]

Maria approved changing the new sublabel to Includes the COSMIC desktop environment. in Mattermost. Also needs the other copy tweaks mentioned in #380 (comment).

I think we should fix #370 and #371 before releasing this, since they're both low-hanging fruit with logically easy solutions that several people were hit with doing early upgrades. I've got a fix for the latter in progress at #382.

[jacobgkau]

This is what the mockup looks like for the final dialog:

This is what the dialog currently looks like on a laptop on battery power (the first sentence doesn't show up if it's plugged in when the dialog's opened):

@pop-os/ux Is this close enough, or should we add the line break and remove the bold to better match the mockup?

[maria-komarova]

Bold is fine as is. The line break would help since there is an icon on the left. I don't know if we can make the dialog a bit narrower but that might help too.