Re: #19015Close#12667
When dragging a dock’s resize handle, only the active panel grows or
shrinks. This patch introduces an opt-in behaviour that lets users
resize every panel hosted by that dock at once.
Release Notes:
- Added new `resize_all_panels_in_dock` setting to optionally resize
every panel in a dock together.
Co-authored-by: Mikayla Maki <mikayla@zed.dev>