polybar: Add underlines to modules

Slightly accent the modules by adding a distinct line under each one, in
the primary color of the current colorscheme.

nvim/.config/nvim/spell/en.utf-8.add

@@ -44,3 +44,11 @@ Qing
 analyses
 megaprojects
 weaponization
+exceptionality
+hypermobility
+Fordist
+FDI
+JIT
+Fordism
+embeddedness
+Zapatista

polybar/.config/polybar/config

@@ -181,6 +181,7 @@ ramp-load-4 = %{F#ff9999}▅%{F-}
 ramp-load-5 = %{F#ff6666}▆%{F-}
 ramp-load-6 = %{F#ff3232}▇%{F-}
 ramp-load-7 = %{F#ff0000}█%{F-}
+format-underline = ${colors.primary}
 
 [module/temp]
 type = internal/temperature
@@ -206,6 +207,7 @@ label-warn-foreground = ${colors.alert}
 ramp-0 =
 ramp-1 = %{F#ff9999}ﲲﲲ%{F-}
 ramp-2 = %{F#ff0000}ﲲﲲﲲ%{F-}
+format-underline = ${colors.primary}
 
 [module/date]
 type = internal/date
@@ -221,6 +223,7 @@ time = %H:%M
 date-alt = %A, %d %B %Y (W %V)
 time-alt = %H:%M
 label = %date% %{T2} %{T-}%time%
+format-underline = ${colors.primary}
 
 ; display information on currently playing track, allows simple track manipulation
 ; TODO: add album art display (on click?) - retrieved by playerctl metadata mpris:artUrl
@@ -231,6 +234,7 @@ exec-if = type $XDG_CONFIG_HOME/polybar/scripts/poly-mprisdisplay
 tail = true
 click-left = kill -USR1 %pid%
 click-right = kill -USR2 %pid%
+format-underline = ${colors.primary}
 
 ; display information on remaining papers to read for the upcoming week
 [module/papersdue]
@@ -250,6 +254,7 @@ interval = 120
 type = custom/script
 exec = $XDG_CONFIG_HOME/polybar/scripts/poly-pomo
 exec-if = exist pomo normal "pomodoro timer"
+format-underline = ${colors.primary}
 ; pause timer
 click-left = $XDG_CONFIG_HOME/polybar/scripts/poly-pomo toggle
 ; restart timer
@@ -267,11 +272,13 @@ format = <label>
 format-padding = 2
 format-prefix = " "
 ; format-foreground = ${colors.primary}
+format-underline = ${colors.primary}
 
 [module/networkspeed]
 type = custom/script
 exec = $XDG_CONFIG_HOME/polybar/scripts/poly-networkspeed
 tail = true
+format-underline = ${colors.primary}
 
 [module/volume]
 type = internal/pulseaudio
@@ -280,6 +287,7 @@ type = internal/pulseaudio
 ;   <ramp-volume>
 ;   <bar-volume>
 format-volume = <ramp-volume>
+format-underline = ${colors.primary}
 
 ; Use PA_VOLUME_UI_MAX (~153%) if true, or PA_VOLUME_NORM (100%) if false
 use-ui-max = false
@@ -301,6 +309,7 @@ ramp-1 = 
 ramp-2 = 
 ramp-3 = 
 ramp-4 = 
+format-underline = ${colors.primary}
 
 [module/battery]
 type = internal/battery
@@ -315,4 +324,5 @@ ramp-capacity-1 = 
 ramp-capacity-2 = 
 ramp-capacity-3 = 
 ramp-capacity-4 = 
+format-underline = ${colors.primary}
 ; vim:ft=dosini