Textualize/textual v0.20.0 on GitHub

[0.20.0] - 2023-04-18

Changed signature of Driver. Technically a breaking change, but unlikely to affect anyone.
Breaking change: Timer.start is now private, and returns None. There was no reason to call this manually, so unlikely to affect anyone.
A clicked tab will now be scrolled to the center of its tab container #2276
Style updates are now done immediately rather than on_idle #2304
ButtonVariant is now exported from textual.widgets.button #2264
HorizontalScroll and VerticalScroll are now focusable by default #2317

Added DataTable.remove_row method #2253
option --port to the command textual console to specify which port the console should connect to #2258
Widget.scroll_to_center method to scroll children to the center of container widget #2255 and #2276
Added TabActivated message to TabbedContent #2260
Added "panel" border style #2292
Added border-title-color, border-title-background, border-title-style rules #2289
Added border-subtitle-color, border-subtitle-background, border-subtitle-style rules #2289

Fixed order styles are applied in DataTable - allows combining of renderable styles and component classes #2272
Fix empty ListView preventing bindings from firing #2281
Fix get_component_styles returning incorrect values on first call when combined with pseudoclasses #2304
Fixed active_message_pump.get sometimes resulting in a LookupError #2301
Fixed issue arising when active tab was changed too quickly in succession #2305