fix: Close existing pickers when starting new one. Fix #102

lua/telescope/pickers.lua

@@ -250,6 +250,7 @@ function Picker:can_select_row(row)
 end
 
 function Picker:find()
+  self:close_existing_pickers()
   self:reset_selection()
 
   local prompt_string = assert(self.prompt, "Prompt is required.")
@@ -649,6 +650,13 @@ function Picker:set_selection(row)
   end
 end
 
+function Picker:close_existing_pickers()
+  for _, prompt_bufnr in ipairs(state.get_existing_prompts()) do
+    actions.close(prompt_bufnr)
+  end
+end
+
+
 pickers.new = function(opts, defaults)
   opts = extend(opts, defaults)
   return Picker:new(opts)