Revert "Bug 1052241 - Disable network activity icon in DEBUG mode"

This reverts commit bcc84b7dcb3be974ca7a329f1aa63c9cfb1c4f91.

Conflicts:
	apps/system/js/statusbar.js
Merge pull request #23972 from mikehenrty/bug-1052241-revert-statusbar-setting

Revert "Bug 1052241 - Disable network activity icon in DEBUG mode"