Release v0.80.1: Foss Push Notifications

• Adds support for Unified Push in the FOSS edition by @KotlinGeekDev
• BugFix for missing push notifications when using Google's edition
• Creates a ViewModel store for each user, which allows faster memory cleanup when switching accounts.
• Fix crash when uploading images/videos using external signer by @greenart7c3
• Adds Lifecycle to all Flow collects in compose to stop processing new events when the app is paused.
• Avoids creation of the LiveData in every recomposition
• Removing Stop with Task from PushNotifications to make sure the PushService remains active.
• Updated translations to Sweden, Portuguese, Czech and German by @davotoula