Fixed: Top nav-bar layout issue, button states, scheduled notifications

Fixed an Android layout bug where the top nav bar was eating extra screen space and menu items could get hidden behind bottom buttons; top nav bar now renders cleanly across all platforms.

Button states: Fixed an issue where color/gradient changes for additional states were affecting the main state instead.

Scheduled notifications: Fixed an issue where users added after a notification was created weren’t included in the send.

HTML Renderer component: Fixed the issue where color changes wouldn’t apply.