fix(pickers): initial normal mode (#1165)

fix(pickers): opts.default_text and cursor are now correctly set for opts.initial_mode="normal"

lua/telescope/pickers.lua

@@ -370,13 +370,19 @@ function Picker:find()
 
     -- TODO(async): I wonder if this should actually happen _before_ we nvim_buf_attach.
     -- This way the buffer would always start with what we think it should when we start the loop.
+    if self.initial_mode == "insert" or self.initial_mode == "normal" then
+      -- required for set_prompt to work adequately
+      vim.cmd [[startinsert!]]
       if self.default_text then
         self:set_prompt(self.default_text)
       end
-
-    if self.initial_mode == "insert" then
-      vim.cmd [[startinsert!]]
-    elseif self.initial_mode ~= "normal" then
+      if self.initial_mode == "normal" then
+        -- otherwise (i) insert mode exitted faster than `picker:set_prompt`; (ii) cursor on wrong pos
+        await_schedule(function()
+          vim.cmd [[stopinsert]]
+        end)
+      end
+    else
       error("Invalid setting for initial_mode: " .. self.initial_mode)
     end