vim-patch:9.0.1443: ending Insert mode when accessing a hidden prompt buffer (#22984)

Problem:    Ending Insert mode when accessing a hidden prompt buffer.
Solution:   Don't stop Insert mode when it was active before. (closes vim/vim#12237)

05a627c3d4

Co-authored-by: Bram Moolenaar <Bram@vim.org>

src/nvim/autocmd.h

@@ -32,6 +32,7 @@ typedef struct {
   bufref_T new_curbuf;            ///< new curbuf
   char *globaldir;                ///< saved value of globaldir
   bool save_VIsual_active;        ///< saved VIsual_active
+  int save_State;                 ///< saved State
 } aco_save_T;
 
 typedef struct AutoCmd_S AutoCmd;