Mail fixes and UI tweaks (opens in new tab)

Known issues [AutoHide][Address field] Can not focus address field via the keyboard with auto hide on (VB-128554) [macOS] No autoupdate or Intel builds initially: they will be added later Changelog [AutoHide] Address bar remains open after focusing into a contenteditable element inside the webview VB-126356 [AutoHide] Border doesn’t appear when panel is completely disabled and […]