How to deselect nested classes in sublime text in .scss formats?

Question

Sass

Please advise on the next step. I don’t know where to look for this setting and how to google this topic.
To edit scss files in sublime text 3, the SCSS.sublime-package plugin is installed.
The next photo shows better what I'm talking about:

For some words, there is a selection, for some words there is no. When you hover over a selected word, a hint is displayed in which file this word occurs.
I don't know what this hint is for, how I turned it on.
I would like to turn it off. Thank you.