* Allow overriding ConversationsTheme.Dark
This change splits the dark theme style into two styles - base that
stays the same in all configurations and Dark - the original - that can
be overridden in specific configurations to add version specific styles.
* Set navigation bar color to dark on dark theme
Use secondary background color as navigation bar color when using dark
theme. This avoids mismatched white colors on certain system themes.
added some white icons,
changed hardcoded icons to theme attributes,
changed icon_edit_dark to icon_edit_body to reflect icons position,
grey message bubbles in dark theme,
misc
purged ic_action_chat as it wasn't used
preference use_white_background changed to use_green_background, default true
grey chat bubbles darker, text white
replaced all grey600 with black icons and 0.54 alpha attribute
highlightColor in dark grey chat bubble now darker than background
* CryptoNextBeta: (60 commits)
Lock TrustKeys if no trusted keys are available
Optimize imports
Use MD style for key trust toggle switch
Fix set/remove OnUpdateBlocklistListener
Fix axolotl database migration
Remove device list from EditAccount
Add clear devices to overflow menu in EditAccount
Ask for key trust when sending messages
Encrypt files for HTTP upload in encrypted chats
Refactor trust key ui and show in account details
Send correct body for HTTP files
Handle file transmission properly in axolotl
Remove unneccessary code
Fix trust status for outgoing messages
Don't merge messages with different trust statuses
Fix copying of axolotl keys to clipboard
Add refresh icon to v21 theme
Disable Axolotl option if not usable
Show trust status of messages' originating session
Add key trust toggle to ContactDetailsActivity
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