fix(ui2): only set dialog on_key callback once #37905

Problem:  vim.on_key() called for each message while cmdline is open.
          Cursor is on a seemingly random column when pager is entered.
          Entering the pager while the cmdline is expanded can be more
          convenient than pressing "g<".
          Pager window is unnecessarily clamped to half the shell height.
          Setting 'laststatus' while pager is open does not adjust its
          dimensions.
Solution: Only call vim.on_key() once when dialog window is opened.
          Ensure cursor is at the start of the first message when
          entering the pager.
          Enter the pager window when "<CR>" is pressed while the
          cmdline is expanded.
          Don't clamp the pager window height.
          Set message windows dimensions when 'laststatus' changes.

0 files changed, 0 insertions, 0 deletions