feat: connectivity view: move quota up and combine with IMAP state.

[Simon-Laux]

like described in #7630 (comment)

classical account (with legacy option mvbox)

multi transport

[r10s]

nice!

for the layout:

• the empty line to divide relays should always be there, unconditionally.
  this makes the layout easier to follow if only parts cannot connect, and it will also result in less bumping on flaky network

• the "green" color of the progress bar is now irritating as mixed with green/yellow/red connected/connecting/disconnected lights.
  just use a neutral grey there, #808080, which will fit in darkmode as well as in lightmode

[iequidoo]

Do we really need these usage progress bars? Usually percentage is important, so maybe just display smth like 12.3% of 100 MiB used? It's not hard to multiply two numbers if usage in bytes is needed. Just a suggestion, the current layout looks good too

[iequidoo]

Maybe prepend '/' so that it's clear it's a folder and not a domain? Will be shown as "/DeltaChat" then which is less confusing being next to e.g. "merlinux.eu"

[Simon-Laux]

could be also confusing when you have multiple accounts on the same relay, because it only shows domain.
either way these are edge-cases and I think they should not block this pr, we can do a follow-up pr if changes become necessary.

[iequidoo]

Having multiple accounts on the same relay isn't a common case i think, but having DeltaChat folder is still the case for non-chatmail.

Multiple accounts on the same relay are useful though if your free space is low. You can periodically switch the primary transport to get more free space.