fix(pickers): misc initial_mode setting fixes (#1895)

lua/telescope/pickers.lua

@@ -434,16 +434,24 @@ function Picker:find()
       self:set_prompt(self.default_text)
     end
 
-    if self.initial_mode == "insert" then
+    if vim.tbl_contains({ "insert", "normal" }, self.initial_mode) then
       vim.schedule(function()
-        -- startinsert! did not reliable do `A` no idea why, i even looked at the source code
-        -- Example: live_grep -> type something -> quit -> Telescope pickers -> resume -> cursor of by one
         local mode = vim.fn.mode()
+        if self.initial_mode == "normal" then
+          if mode ~= "n" then
+            a.nvim_input "<ESC>"
+          end
+        else
+          -- Example: live_grep -> type something -> quit -> Telescope pickers -> resume -> cursor of by one
+          -- vim.cmd doesn't schedule appropriately, bypass with `nvim_input`
+          -- histdel('cmd', -1) to not pollute command history with startinsert & echon to clear "startinsert" msg
           if mode ~= "i" then
-          a.nvim_input(mode ~= "n" and "<ESC>A" or "A")
+            local cmd = ":startinsert!|call histdel('cmd', -1)|echon ''<CR>"
+            a.nvim_input(mode ~= "n" and "<ESC>" .. cmd or cmd)
+          end
         end
       end)
-    elseif self.initial_mode ~= "normal" then
+    else
       error("Invalid setting for initial_mode: " .. self.initial_mode)
     end