VLC 4: Do not draw focus when interacting with the mouse

Currently in the Qt/QML VLC 4 redesign nearly all elements draw focus when interacting with them with the mouse, while it is usually expected to only happen when interacting with keyboard navigation with those. To clarify what I mean with focus, below is a screenshot of the titlebar with the back button focused, indicated by the black border:

Apart from feeling weird that every other control gains a thick black border when interacting with it, this has even more severe and annoying consequences for other controls:

In the cover art view, an item displays the play icon not only on hover but on focus too, as when navigating the UI with the keyboard this is expected to happen. However when navigating with the mouse, this leads to the item showing the play icon even when not hovered. In collections that only show one item this leads to the play icon to always show for that item making it impossible to see the actual cover art:

It can be made visible then clicking on some buttons in the UI to cause focus to switch to that item, but that is far from a intuitive UX:

Additionally focus currently has some issues when interacting with the mouse, for example dragging the window on the back arrow area in the titlebar causes focus to jump to the back icon, even though it was never clicked or interacted with. (This is a somewhat minor issue though, but becomes incredibly apparent by the fact focus is always shown with the black border)