Use ionicons for sensor icons

src/sensors/battery.rs

@@ -22,7 +22,7 @@ impl BatterySensor {
 
 impl Sensor for BatterySensor {
     fn icon(&self) -> String {
-        "BAT".to_string()
+        "".to_string()
     }
 
     fn status(&self) -> String {

src/sensors/netspeed.rs

@@ -39,7 +39,7 @@ impl NetSpeedSensor {
 
 impl Sensor for NetSpeedSensor {
     fn icon(&self) -> String {
-        "NET".to_string()
+        "".to_string()
     }
 
     fn status(&self) -> String {

src/sensors/temperature.rs

@@ -20,7 +20,7 @@ impl TempSensor {
 
 impl Sensor for TempSensor {
     fn icon(&self) -> String {
-        "TEMP".to_string()
+        "".to_string()
     }
 
     fn status(&self) -> String {

src/sensors/time.rs

@@ -24,7 +24,7 @@ impl Sensor for TimeSensor {
             "UTC"
         }
         else {
-            "LOC"
+            ""
         }.to_string()
     }