Quick fix about importing method

[ydmykr]

On SO，Users want to be able to select the package of the method when importing the method, although this will put great pressure on retrieval.

for example，the method import WebDriverWait, users want to be able to choose this method, which comes from selenium.webdriver.support.wait

After selection, it can be automatically completed as from selenium.webdriver.support.wait import WebDriverWait

At present, if it is only an import method, it will not have any prompt

[heejaechang]

@ydmykr currently we only support first level symbols on auto import by default. but you can use hidden option to enable more costly import if you want to.

see here for more detail - #2533 (comment)