Add styles for upower and sndio.

Index: resources/style.css
--- resources/style.css.orig
+++ resources/style.css
@@ -93,7 +93,10 @@ button:hover {
 #idle_inhibitor,
 #scratchpad,
 #power-profiles-daemon,
-#mpd {
+#mpd,
+#custom-power,
+#custom-battery,
+#custom-temperature {
     padding: 0 10px;
     color: #ffffff;
 }
@@ -122,6 +125,11 @@ button:hover {
     color: #000000;
 }
 
+#custom-battery {
+    background-color: #ffffff;
+    color: #000000;
+}
+
 #battery.charging, #battery.plugged {
     color: #ffffff;
     background-color: #26A65B;
@@ -164,6 +172,21 @@ button:hover {
     color: #000000;
 }
 
+#upower {
+    background-color: #2980b9;
+    color: #fff;
+}
+
+#upower.discharging {
+    background-color: #2980b9;
+    color: #fff;
+}
+
+#upower.charging {
+    background-color: #288049;
+    color: #fff;
+}
+
 label:focus {
     background-color: #000000;
 }
@@ -203,6 +226,17 @@ label:focus {
     color: #2a5c45;
 }
 
+#sndio,
+#custom-sndio {
+    background-color: #f1c40f;
+    color: #000;
+}
+
+#sndio.muted {
+    background-color: #90b1b1;
+    color: #2a5c45;
+}
+
 #wireplumber {
     background-color: #fff0f5;
     color: #000000;
@@ -227,6 +261,10 @@ label:focus {
 }
 
 #temperature {
+    background-color: #f0932b;
+}
+
+#custom-temperature {
     background-color: #f0932b;
 }
 
