osd: partially revert last commit

Animate icon changes

widgets/VerticalSlider.qml

@@ -57,6 +57,7 @@ Slider {
             MaterialIcon {
                 id: icon
 
+                animate: true
                 text: root.icon
                 color: Colours.palette.m3inverseOnSurface
                 anchors.centerIn: parent
@@ -66,6 +67,7 @@ Slider {
                     when: handle.moving
 
                     PropertyChanges {
+                        icon.animate: false
                         icon.text: Math.round(root.value * 100)
                         icon.font.pointSize: Appearance.font.size.small
                         icon.font.family: Appearance.font.family.sans