[Battery Monitor] Just use "battery tooltip icon

There's no point in having separate logic for the tooltip and Breeze
doesn't have the icons we need anyway.

CCBUG: 360276

applets/batterymonitor/package/contents/code/logic.js

@@ -59,17 +59,12 @@ function updateTooltip(remainingTime) {
     }
 
     if (batteries.count === 0) {
-        batteries.tooltipImage = "battery-missing";
         batteries.tooltipMainText = i18n("No Batteries Available");
     } else if (pmSource.data["Battery"]["State"] === "FullyCharged") {
-        batteries.tooltipImage = "battery-100";
         batteries.tooltipMainText = i18n("Fully Charged");
     } else if (pmSource.data["AC Adapter"] && pmSource.data["AC Adapter"]["Plugged in"]) {
-        batteries.tooltipImage = "battery-charging"
         batteries.tooltipMainText = i18n("%1%. Charging", pmSource.data["Battery"]["Percent"])
     } else {
-        batteries.tooltipImage = "battery-discharging"
-
         if (remainingTime > 0) {
             batteries.tooltipMainText = i18nc("%1 is remaining time, %2 is percentage", "%1 Remaining (%2%)",
                                               KCoreAddons.Format.formatDuration(remainingTime, KCoreAddons.FormatTypes.HideSeconds),

applets/batterymonitor/package/contents/ui/batterymonitor.qml

@@ -37,7 +37,7 @@ Item {
 
     Plasmoid.toolTipMainText: batteries.tooltipMainText
     Plasmoid.toolTipSubText: batteries.tooltipSubText
-    Plasmoid.icon: batteries.tooltipImage
+    Plasmoid.icon: "battery"
 
     property bool disableBrightnessUpdate: false
 
@@ -154,7 +154,6 @@ Item {
 
         property string tooltipMainText
         property string tooltipSubText
-        property string tooltipImage
     }
 
     Plasmoid.fullRepresentation: PopupDialog {