If pin-tags is set, there is no format defined for tags that are not occupied.
However defining a format for unoccupied tags makes the pin-tags setting
redundant since then the label can just be set to empty to not show unoccupied
tags.
Following the above reasoning, the pin tags setting is removed, and
state_t::NONE is renamed to state_t::EMPTY. This way if a user wants to display
empty tags, they can specify the format, otherwise they can simply set the label
to an empty string.
label-state will be the label used for each tag. label-layout will show the
current layout. label-title will show the current window title.
label-title allows each monitor to show its selected window's title on the bar.
The xwindow module only shows the currently focused window on all monitors.
pin-tags will show all tags whether or not they are selected.
label-separator is inserted between workspaces.
enable-click will allow the user to view tags and toggle the view on tags.
