os/+arch (polybar): polish + tweaks + add eth module

os/+arch/.config/polybar/config

@@ -50,7 +50,7 @@ font-2 = FontAwesome:fontformat=truetype:size=11;1
 
 modules-left = bspwm
 modules-center = date
-modules-right = pkg mail volume redshift
+modules-right = eth pkg mail volume redshift
 
 enable-ipc = true
 
@@ -239,11 +239,11 @@ ramp-signal-foreground = ${colors.foreground-alt}
 
 [module/eth]
 type = internal/network
-interface = enp0s31f6
+interface = ${env:ETH:enp0s31f6}
 interval = 3.0
 
-format-connected-underline = #55aa55
-format-connected-prefix = " "
+; format-connected-underline = #55aa55
+; format-connected-prefix = " "
 format-connected-foreground-foreground = ${colors.foreground-alt}
 label-connected = %local_ip%
 
@@ -275,9 +275,9 @@ format-volume = <ramp-volume>
 ; label-volume = " "
 label-volume-foreground = ${root.foreground}
 
-format-muted-prefix = " "
+; format-muted-prefix = " "
 format-muted-foreground = ${colors.foreground-alt}
-; label-muted = sound muted
+label-muted = 
 
 bar-volume-width = 10
 bar-volume-foreground-0 = #55aa55

os/+arch/.config/polybar/modules/mail

@@ -15,6 +15,7 @@ n = 0
 if os.path.isfile(CONFIG_FILE):
     with open(CONFIG_FILE) as fp:
         for line in fp:
+            if line:
                 addr, pwd = line.strip().split(",")
                 obj = imaplib.IMAP4_SSL('imap.gmail.com', 993)
                 obj.login(addr, pwd)
@@ -22,7 +23,8 @@ if os.path.isfile(CONFIG_FILE):
                 n += len(obj.search(None, 'UnSeen')[1][0].split())
                 obj.close()
                 obj.logout()
-    print("%{{F#{}}}{} {}".format(COLOR_HL if n > 0 else COLOR_NONE, ICON, n))
+    cl = COLOR_HL if n > 0 else COLOR_NONE
+    print("%{{u#{}}}%{{F#{}}}{} {}".format(cl, cl, ICON, n))
 else:
     print("%{{F#{}}}{} -".format(COLOR_ERR, ICON))
     sys.exit(1)