Android app: visibility of 'Toggle' button (one that expands/collapses a block) should be configurable.

Android app.

There should be a setting so that the 'Toggle' button that expands/collapses a block could (1) always be visible or (2) only be visible when the block is tapped (as it is today).

I think the customization option would be interesting because some users will prefer the way it is today (less "polluted" interface; button is not visible if not necessary) while others will prefer to traverse the block tree (expanding and collapsing) with greater agility, just by tapping the 'Toggle' buttons immediately, without having to select the block first.