Signal Desktop: v1.15.0-beta.6 Release

Fixed: When marking safety number as verified/not verified, that state would not sync to mobile device

Fixed: Sometimes icons would flicker when first displayed

Fixed: Conversation preview would show blank for a generic 'group updated' notification

Fixed: Messages received when a conversation was not loaded would sometimes not render when that conversation was next loaded, only showing up after a restart

Fixed: In-conversation message would sometimes not be updated with delivered/read status

Fixed: Sometimes a conversation would not scroll to the bottom on open

Fixed: RTL languages would not display properly in new message bubbles

Visual changes: - Conversation Header: centered title - Conversation List Item: name is only bold when unread - Disappearing messages: show 'disabled' instead of 'set to off' - Group 'show members' screen: Add spacing around each item

Dev: - Introduce mandatary migration on startup, to minimum version 7 - Move to centralized message/cache data layer - Preserve migration state when deleting config due to failed login - Fix reference to i18n key: Unlinked -> unlinked - Conversation: store lastMessage/lastMessageStatus in memory only - On message delete, ensure that all external files are deleted - Ensure that color mapping matches Android