I would like to create a new webapp like this:
yiic webapp ../websites/test
>>with database? [YES][NO]
>>type [MYSQL] [SQLITE]
>>dbname:
>>user:
>>password:
>>create project? [YES][NO]
now in config/main.php we have a properly configuered db-component
It would be definitely a great enhancement if creating a new webapp were done via GUI.
In this way it’d be overly complicated. I rather write this half line in my text editor.
I would apreciate this feature. I often forget to configure my database 
Besides, it would be more friendly to new users
I always forget the correct syntax of the PDO-connection string, currently I need to lookup in a previous project to copy/paste 
but I think I can handle it with a code snippet in my editor
Great idea, thanks for the tip. 
How to do that?
Depends on your editor, maybe it’s not even supported.
In NetBeans, select Tools > Options > Editor > Code Templates.