When any of the folders or the root are selected there's a color added to the left side, like a breadcrumb. I can't find where this is defined. I can associate a style class and add element states like hover or selected or visited or checked none of them override this when an item has been selected.
Element State
| State | Description |
|---|---|
| active | The component is being activated by the user. For example, clicking on it with a mouse. |
| checked | The component is checked or toggled to an "on" state. Applies to checkboxes, radio buttons, etc. |
| default-choice | The component is the default selection in a group of related options. |
| disabled | The component is disabled and it cannot be selected, clicked on, typed into, or accept focus. |
| empty | Represents any element that has no children. Children can be either element nodes or text (including whitespace). |
| enabled | The component is enabled and can be selected, clicked on, typed into, or accept focus. |
| first-child | Changes the style for the first element among a group of sibling elements. |
| fullscreen | Automatically adjust the size, style, or layout of content when elements switch back and forth between full-screen and traditional presentations. |
| focus | The component receives focus. It is generally triggered when the user clicks or taps on an element or selects it with the keyboard's tab key. |
| hover | User hovers mouse over the component. |
| in-range | Element whose current value is within the range limits specified by the min and max attributes. |
| invalid | The component has an invalid input or selection based on the input type or validation rules. |
| last-child | The component is the last element among a group of sibling elements. |
| link | The component acts as a hyperlink, navigating the user to a different location when activated. |
| only-child | The component is the only child of its parent |
| out-of-range | The component's current value is outside the range limits specified by the min and max attributes |
| read-only | The component is read-only. |
| read-write | The component is available for read and write. |
| required | The component must be filled before submitting a form. |
| valid | The component has a valid input or selection based on the input type or validation rules. |
| visited | The component links that the user has already visited. |




