Added bindsym to switch/focus root container for master/stack type

layouts.

i3/config

@@ -81,6 +81,8 @@ for_window [class=".*"] title_window_icon padding 3px
 # focus_wrapping <yes|no|force|workspace>
 # Legacy syntax: "force_focus_wrapping force"
 focus_wrapping yes
+# parent focus switch (useful for master/stack switching)
+bindsym $mod+r focus parent; focus left
 
 # Hide borders <none|vertical|horizontal|both|smart>
 hide_edge_borders none

i3/config.simple

@@ -81,6 +81,8 @@ for_window [class=".*"] title_window_icon padding 3px
 # focus_wrapping <yes|no|force|workspace>
 # Legacy syntax: "force_focus_wrapping force"
 focus_wrapping yes
+# parent focus switch (useful for master/stack switching)
+bindsym $mod+r focus parent; focus left
 
 # Hide borders <none|vertical|horizontal|both|smart>
 hide_edge_borders none