Polybar: Change content of secondary bars, add empty module

The empty module is so that you can null out a section of the bar more easily
i.e. PB_BAR_PRIMARY_MODULES_LEFT=nothing

.config/dtfscripts/dsk-cstm-0.rc

@@ -1,6 +1,6 @@
 #!/bin/sh
 export PB_BAR_WIDTH=2548
 export PB_BAR_SECONDARY_WIDTH=1908
-export PB_MODULE_BAR_WIDTH=75
+export PB_MODULE_BAR_WIDTH=60
 export PB_MODULE_WLAN_INTERFACE=wlp5s0