[dash] No direct way to go back to home page

[anonymous815]

When you press the Ubuntu button in the top-left on unity-2d-panel, or the windows key if you aren't using the panel, you have then pick a category in the dash that pops up. After doing so and being taken to the relevant page, you have to then click the panel button twice in a row or close that window and press the windows key again to get to the categories screen.
Surely it makes more sense to assign the windows key, or another, to take you back to category screen without the complication and un-unified look of leaving and coming back again.

I know you may say that the categories are listed at the top of the columns with the search bar when you do choose, but then I say: well what is the point of this big empty categories screen?