fix: increase cache buffers to reduce visual glitches

Also set initial notif state and notif content non async

modules/sidebar/Notif.qml

@@ -26,9 +26,10 @@ StyledRect {
         return expanded ? c : Qt.alpha(c, 0);
     }
 
+    state: expanded ? "expanded" : ""
+
     states: State {
         name: "expanded"
-        when: root.expanded
 
         PropertyChanges {
             summary.anchors.margins: Appearance.padding.normal
@@ -156,7 +157,6 @@ StyledRect {
     component WrappedLoader: Loader {
         required property bool shouldBeActive
 
-        asynchronous: true
         opacity: shouldBeActive ? 1 : 0
         active: opacity > 0
 

modules/sidebar/NotifDockList.qml

@@ -19,7 +19,7 @@ LazyListView {
     implicitHeight: contentHeight
 
     spacing: Appearance.spacing.small
-    cacheBuffer: 200
+    cacheBuffer: 400
     asynchronous: true
 
     useCustomViewport: true

modules/sidebar/NotifGroupList.qml

@@ -25,7 +25,7 @@ LazyListView {
     spacing: Math.round(Appearance.spacing.small / 2)
     asynchronous: true
 
-    cacheBuffer: 200
+    cacheBuffer: 800
     removeDuration: Appearance.anim.durations.normal
 
     useCustomViewport: true