Easier task minimization with mouse
Is your feature request related to a problem? Please describe. To minimize a task, right now you have to click the minimize button all the way to the right of the screen or do ctrl + h to minimize all tasks.
Describe the solution you'd like It would be great to just click on any empty gray/white space inside the task box to be able to minimize it in addition to the minimize button on the right.
So you wish to collapse a task on focus loss?
I assume by "focus loss" you mean clicking anywhere outside of the task box. If so, then no, I mean collapsing a task when you click on the task itself (any gray space in the task that isn't a text box or a button).

Collapse a task on focus loss sounds handy to me - and is in line of what other apps would do, I think.