revert: bf7d64b3 . Fixes panel height adjusting fails when the panel is on top / left

BUG: 430050

desktoppackage/contents/configuration/panelconfiguration/ToolBar.qml

@@ -120,10 +120,7 @@ Item {
             from: 20 // below this size, the panel is mostly unusable
             to: PlasmaCore.Types.LeftEdge || panel.location === PlasmaCore.Types.RightEdge ? panel.screenToFollow.geometry.width / 2 : panel.screenToFollow.geometry.height / 2
 
-            // When the panel is on the top or left, we need to reverse the drag
-            // and scroll directions so people can drag and scroll towards the
-            // center of the screen
-            stepSize: panel.location === PlasmaCore.Types.TopEdge || panel.location === PlasmaCore.Types.RightEdge ? -2 : 2
+            stepSize: 2
 
             value: panel.thickness
             onValueModified: {