Minimize All Audio/Video tracks

Could we get a feature to minimize all video tracks or all audio tracks?
When working only on video (titles etc), I'd like to be able to minimize all audio tracks with a shortcut.
By "minimize" I mean like grabbing the divider between audio and video tracks and dragging it all the way up or down.
Pressing the shortcut again should restore the divider location to the previous position.
Just to get more real estate for what's important.
Edit:
My recent feature requests concerning tracks (minimize all tracks, show thumbnail view for only specific tracks, grouping tracks, removing the video/audio track separation) can all be seen in this video:

When working only on video (titles etc), I'd like to be able to minimize all audio tracks with a shortcut.
By "minimize" I mean like grabbing the divider between audio and video tracks and dragging it all the way up or down.
Pressing the shortcut again should restore the divider location to the previous position.
Just to get more real estate for what's important.
Edit:
My recent feature requests concerning tracks (minimize all tracks, show thumbnail view for only specific tracks, grouping tracks, removing the video/audio track separation) can all be seen in this video:
