Autocomplete in Active Code might be confusing for new users

[thaopham03]

Is your feature request related to a problem? Please describe.

Recently @njounkengdaizem and I are working on issue #44 to add the code completion for active code. The code completion is successfully tested and waiting for a review. However, we recognize a potential blocker for users to use this feature is that they have to know the extrakey "Ctrl + Space":

Otherwise, the autocomplete is completely hidden from users.

Describe the solution you'd like

A solution we suggest is that we can add a small information icon on the top right of the codeblock. This icon will inform the users how to use the autocomplete feature when they click in in case they are not aware of.

Describe alternatives you've considered

There are another solution we might consider: We just put the text on the code and will disappear when users start coding.