Adapt new Nextcloud app theme

[stefan-niedermann]

Major items of the new theme are

• No brand color for the header (still for FABs and so on)
• Statusbar and Navigatinbar have the same background color as the main content
• Account management goes from sidebar to the top right of the toolbar of the "main" activity
• Since your app supports some kind of global search: The toolbar looks by default like a search box, on click it opens the searchbar and hides everything else in the toolbar.

Of course you are welcome to have a look at the Notes app (which itself had a look at the Files app while implementing - open source rocks 🤘😁)

By the way @daper did you already know that all the developers are in a community chat at the Nextcloud Talk instance? You are invited as well of course! If you want to join, send me an e-Mail to info@niedermann.it

[daper]

Hey @stefan-niedermann, ouch! :sweat_smile: This is a huge enhancement of the design... I think it will have for a while the blue design at least until I can arrange time to fix the logins and other ones. Unless a kind soul makes a PR hehee. And thank you for the Talk invitation; yes, I have to catch up with all these channels :)

[stefan-niedermann]

One can work on those issues independently. Maybe it helps to split it up into

• 👤 Move account switcher from sidenav header to toolbar
• ⚪ Use white as primary color and Nextcloud Blue for primary UI elements
• 🔵 Apply account color (from capabilities endpoint) to primary UI elements like FAB
• 🔍 Make search displayed as a card