Customise appearance of menu from 'course navigation' extension

Is it possible to get rid of the icons which appear in front of each line of text when the ‘course navigation’ extension is enabled?
Also was wondering if the height of this side bar is customisable or is it hard coded?
I’d like it to be shorter to fit the text if possible? I managed to change colour and width so far.

And the black semi-transparent overlay that goes over the entire page (when menu is active), is that hard coded too? I can’t seem to find any settings for these.

any ideas much appreciated!

Hello @Angela_Gigica,

The icons are fixed as is the height and overlay.

Thank you.