some changes in top panel layout

remove activities widget temporary, it's interaction is not much clear yet, and this is confusing to most of the external users, and after explaining usecase they expected it to be in the kind of "edit mode" or something.

Also remove the battery percentage from top panel, showing battery percentage on top of battery-icon makes super unclean look-and-feel and also since text height and battery icon height is similar, it actually hides the battery icon, making whole thing more confusing.

The battery percentage also causes the weird GPU crash in the lima/etnaviv driver, We are yet to debug this but it seems to be caused by some specific shader we are using in battery icon overlay

CC: @mart