Don't let "activated" windows steal focus

"activation" is eg. when opening new tab/window using CLI and a
window-managing app such as Firefox.

This has been bugging me for ages with qutebrowser, which (possibly by
bug) activates previous window even in non-tab mode, preventing new
window to appear in intuitive order within current container.

dotfiles/i3/config

 workspace_layout stacked
 workspace_auto_back_and_forth yes
 force_display_urgency_hint 500 ms
+focus_on_window_activation none
 
 # change focus
 bindsym $mod+h              focus left