Make completion to use tab to to move next keyword argument after keyword completion

[aaltat]

If keyword completion feature is used, example for Log keyword. it by default looks like this:

Log
    ...    message
    ...    level
    ...    html
    ...    console
    ...    repr

The cursor is places on the last like after the word repr, which is not optimal solution. In many cases it would be better if the cursor would be on line which contains the message word. Also it would be useful if the tab key could be used to jump to the next arguments.

It seems that this is possible, see better details in the https://www.sublimetext.com/docs/3/api_reference.html#sublime_plugin.EventListener API documentation examples.

[aaltat]

Referenced wrong thing in the commit.