Re-add support for the :browse command modifier

src/nvim/ex_cmds_defs.h

@@ -176,6 +176,7 @@ typedef struct {
   int lockmarks;                        /* TRUE when ":lockmarks" was used */
   int keeppatterns;                     /* TRUE when ":keeppatterns" was used */
   bool noswapfile;                      /* true when ":noswapfile" was used */
+  bool browse;                          ///< TRUE to invoke file dialog
   char_u      *save_ei;                 /* saved value of 'eventignore' */
 } cmdmod_T;
 

src/nvim/ex_docmd.c

@@ -1315,6 +1315,7 @@ static char_u * do_one_cmd(char_u **cmdlinep,
         continue;
       }
       if (checkforcmd(&ea.cmd, "browse", 3)) {
+        cmdmod.browse = true;
         continue;
       }
       if (!checkforcmd(&ea.cmd, "botright", 2))